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{{Infobox diagnostic {{Infobox diagnostic
| name = Prostate cancer screening | name = Prostate cancer screening
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'''Prostate cancer screening''' is the ] process used to detect undiagnosed ] in men without ] or ].<ref name=PDQ2018/><ref name="NCI">{{cite web | url = https://www.cancer.gov/types/prostate/hp/prostate-screening-pdq | title=Prostate Cancer Screening-Professional Version |website=National Cancer Institute|access-date=2018-02-28| date=1980-01-01 }}{{PD-notice}}</ref> When abnormal prostate tissue or cancer is found early, it may be easier to treat and cure, but it is unclear if early detection reduces mortality rates.<ref name="NCI" />
'''Prostate cancer screening''' is an attempt to identify individuals with ] in a broad segment of the population—those for whom there is no reason to suspect prostate cancer.<ref name="NYT-20151125">{{cite news |author=The Editorial Board |title=A Better Way to Screen for Prostate Cancer |url=https://www.nytimes.com/2015/11/25/opinion/a-better-way-to-screen-for-prostate-cancer.html |date=25 November 2015 |work=] |accessdate=26 November 2015 }}</ref> There are {{As of|2005|alt=currently}} two methods used: One is the ] (DRE), in which the examiner inserts a gloved, lubricated finger into the rectum to examine the adjoining ]. The other is the ] (PSA) ] test, which measures the concentration of this molecule in the blood.<ref>{{cite journal |vauthors=Hayes JH, Barry MJ | title = Screening for prostate cancer with the prostate-specific antigen test: a review of current evidence | journal = JAMA| volume = 311 | issue = 11 | pages = 1143–9 | year = 2014 | pmid = 24643604 | doi = 10.1001/jama.2014.2085}}</ref>


Screening precedes a diagnosis and subsequent treatment. The ] (DRE) is one screening tool, during which the prostate is manually assessed through the wall of the rectum. The second screening tool is the measurement of ] (PSA) in the ]. The evidence remains insufficient to determine whether screening with PSA or DRE reduces mortality from prostate cancer.<ref name="PDQ2018">{{Cite book|chapter-url=https://www.ncbi.nlm.nih.gov/books/NBK65945/|title=PDQ Cancer Information Summaries|last=PDQ Screening and Prevention Editorial Board|date=2018|publisher=National Cancer Institute (US)|location=Bethesda (MD)|pmid=26389383|chapter=Prostate Cancer Screening (PDQ®): Health Professional Version}}{{PD-notice}}</ref> A 2013 ] review concluded PSA screening results in "no statistically significant difference in prostate cancer-specific mortality...".<ref name=":7" /> The American studies were determined to have a high bias. European studies included in this review were of low bias and one reported "a significant reduction in prostate cancer-specific mortality." PSA screening with DRE was not assessed in this review. DRE was not assessed separately.<ref name=":7" />
The ] (USPSTF) in 2012 recommended against PSA screening for all ages finding that the potential risks outweigh the potential benefits.<ref>{{cite web|title=Final Update Summary: Prostate Cancer: Screening - US Preventive Services Task Force|url=https://www.uspreventiveservicestaskforce.org/Page/Document/UpdateSummaryFinal/prostate-cancer-screening|website=www.uspreventiveservicestaskforce.org|accessdate=1 July 2017|language=en|date=May 2012}}</ref> A draft proposal in 2017 includes recommendations against PSA screening in those over 70 years old and individualizing the decision to screen in those 55 to 70.<ref>{{cite web|title=Draft Recommendation Statement: Prostate Cancer: Screening - US Preventive Services Task Force|url=https://www.uspreventiveservicestaskforce.org/Page/Document/draft-recommendation-statement/prostate-cancer-screening1|website=www.uspreventiveservicestaskforce.org|accessdate=1 July 2017|language=en}}</ref>


Guidelines from the American Urological Association,<ref>{{cite journal|last=Greene|first=KL|author2=Albertsen, PC; Babaian, RJ; Carter, HB; Gann, PH; Han, M; Kuban, DA; Sartor, AO; Stanford, JL; Zietman, A; Carroll, P; American Urological, Association|title=Prostate specific antigen best practice statement: 2009 update|journal=The Journal of Urology|date=January 2013|volume=189|issue=1 Suppl|pages=S2–S11|pmid=23234625|doi=10.1016/j.juro.2012.11.014}}</ref> and the American Cancer Society<ref>{{cite journal|last=Wolf|first=AM|author2=Wender, RC; Etzioni, RB; Thompson, IM; D'Amico, AV; Volk, RJ; Brooks, DD; Dash, C; Guessous, I; Andrews, K; DeSantis, C; Smith, RA; American Cancer Society Prostate Cancer Advisory, Committee|title=American Cancer Society guideline for the early detection of prostate cancer: update 2010|journal=CA: A Cancer Journal for Clinicians|date=Mar–Apr 2010|volume=60|issue=2|pages=70–98|pmid=20200110|doi=10.3322/caac.20066}}</ref> recommend that men be informed of the risks and benefits of screening. The ] recommends screening be discouraged in those who are expected to live less than ten years, while in those with a life expectancy of greater than ten years a decision should be made by the person in question based on the potential risks and benefits. In general, they conclude that based on recent research, "it is uncertain whether the benefits associated with PSA testing for prostate cancer screening are worth the harms associated with screening and subsequent unnecessary treatment." <ref>{{cite journal|last=Basch|first=E|author2=Oliver, TK |author3=Vickers, A |author4=Thompson, I |author5=Kantoff, P |author6=Parnes, H |author7=Loblaw, DA |author8=Roth, B |author9=Williams, J |author10= Nam, RK |title=Screening for Prostate Cancer With Prostate-Specific Antigen Testing: American Society of Clinical Oncology Provisional Clinical Opinion.|journal=Journal of Clinical Oncology|date=Jul 16, 2012|pmid=22802323|url=http://jco.ascopubs.org/content/early/2012/07/16/JCO.2012.43.3441.full.pdf|doi=10.1200/JCO.2012.43.3441|volume=30|issue=24|pages=3020–5|pmc=3776923}}</ref> Most recent guidelines have recommended that the decision whether or not to screen should be based on ],<ref>{{cite web|title=Prostate Cancer Guidelines|url=https://emedicine.medscape.com/article/1967731-guidelines|website=Emedicine|access-date=18 February 2018|date=2017}}</ref> so that men are informed of the risks and benefits of screening.<ref>{{cite journal | vauthors = Greene KL, Albertsen PC, Babaian RJ, Carter HB, Gann PH, Han M, Kuban DA, Sartor AO, Stanford JL, Zietman A, Carroll P | title = Prostate specific antigen best practice statement: 2009 update | journal = The Journal of Urology | volume = 189 | issue = 1 Suppl | pages = S2–S11 | date = January 2013 | pmid = 23234625 | doi = 10.1016/j.juro.2012.11.014 }}</ref><ref>{{cite journal | vauthors = Wolf AM, Wender RC, Etzioni RB, Thompson IM, D'Amico AV, Volk RJ, Brooks DD, Dash C, Guessous I, Andrews K, DeSantis C, Smith RA | title = American Cancer Society guideline for the early detection of prostate cancer: update 2010 | journal = CA: A Cancer Journal for Clinicians | volume = 60 | issue = 2 | pages = 70–98 | date = Mar–Apr 2010 | pmid = 20200110 | doi = 10.3322/caac.20066 | s2cid = 21548482 | doi-access = free }}</ref> In 2012, the ] recommends screening be discouraged for those who are expected to live less than ten years, while for those with a longer life expectancy a decision should be made by the person in question. In general, they conclude that based on recent research, "it is uncertain whether the benefits associated with PSA testing for prostate cancer screening are worth the harms associated with screening and subsequent unnecessary treatment."<ref>{{cite journal | vauthors = Basch E, Oliver TK, Vickers A, Thompson I, Kantoff P, Parnes H, Loblaw DA, Roth B, Williams J, Nam RK | title = Screening for prostate cancer with prostate-specific antigen testing: American Society of Clinical Oncology Provisional Clinical Opinion | journal = Journal of Clinical Oncology | volume = 30 | issue = 24 | pages = 3020–5 | date = August 2012 | pmid = 22802323 | pmc = 3776923 | doi = 10.1200/JCO.2012.43.3441 }}</ref>


] are used to diagnose prostate cancer but are not done on asymptomatic men and therefore are not used for screening.<ref name="Borghesi_2017">{{cite journal | vauthors = Borghesi M, Ahmed H, Nam R, Schaeffer E, Schiavina R, Taneja S, Weidner W, Loeb S | title = Complications After Systematic, Random, and Image-guided Prostate Biopsy | journal = European Urology | volume = 71 | issue = 3 | pages = 353–365 | date = March 2017 | pmid = 27543165 | doi = 10.1016/j.eururo.2016.08.004 | hdl = 11585/559951 | url = http://discovery.ucl.ac.uk/1514676/ | hdl-access = free }}</ref><ref name=":2">{{cite journal | vauthors = Loeb S, Vellekoop A, Ahmed HU, Catto J, Emberton M, Nam R, Rosario DJ, Scattoni V, Lotan Y | title = Systematic review of complications of prostate biopsy | journal = European Urology | volume = 64 | issue = 6 | pages = 876–92 | date = December 2013 | pmid = 23787356 | doi = 10.1016/j.eururo.2013.05.049 | doi-access = free }}</ref> Infection after prostate biopsy occurs in about 1%, while death occurs as a result of biopsy in 0.2%.<ref name=":3">{{cite journal | vauthors = Bennett HY, Roberts MJ, Doi SA, Gardiner RA | title = The global burden of major infectious complications following prostate biopsy | journal = Epidemiology and Infection | volume = 144 | issue = 8 | pages = 1784–91 | date = June 2016 | pmid = 26645476 | doi = 10.1017/S0950268815002885 | pmc = 9150640 | s2cid = 82280 }}</ref><ref name=CMAJ2014/> Prostate biopsy guided by ] has improved the diagnostic accuracy of the procedure.<ref name=":4">{{cite journal | vauthors = Schoots IG, Roobol MJ, Nieboer D, Bangma CH, Steyerberg EW, Hunink MG | title = Magnetic resonance imaging-targeted biopsy may enhance the diagnostic accuracy of significant prostate cancer detection compared to standard transrectal ultrasound-guided biopsy: a systematic review and meta-analysis | journal = European Urology | volume = 68 | issue = 3 | pages = 438–50 | date = September 2015 | pmid = 25480312 | doi = 10.1016/j.eururo.2014.11.037 }}</ref><ref name=":5">{{cite journal | vauthors = Wegelin O, van Melick HH, Hooft L, Bosch JL, Reitsma HB, Barentsz JO, Somford DM | title = Comparing Three Different Techniques for Magnetic Resonance Imaging-targeted Prostate Biopsies: A Systematic Review of In-bore versus Magnetic Resonance Imaging-transrectal Ultrasound fusion versus Cognitive Registration. Is There a Preferred Technique? | journal = European Urology | volume = 71 | issue = 4 | pages = 517–531 | date = April 2017 | pmid = 27568655 | doi = 10.1016/j.eururo.2016.07.041 }}</ref>
==Controversy about screening==
Prostate cancer can develop into a fatal, painful disease, but it can also develop so slowly that it will never cause problems during the man's lifetime.<ref name="NYT-20151125" /> It is difficult for a physician to determine how the cancer will proceed based on screening tests currently available alone.<ref name="NYT-20151125" />


== Prostate-specific antigen ==
The ] (]) recommended against PSA screening in healthy men finding that the potential risks outweigh the potential benefits.<ref name="GHarris">{{cite news |last=Harris |first=Gardner |title=U.S. Panel Says No to Prostate Screening for Healthy Men |url=https://www.nytimes.com/2011/10/07/health/07prostate.html |date=6 October 2011 |publisher=] |accessdate=2011-10-08 }}</ref> This October 2011 recommendation is based on a review of evidence and concludes that "prostate-specific antigen–based screening results in small or no reduction in prostate cancer–specific mortality and is associated with harms related to subsequent evaluation and treatments, some of which may be unnecessary."<ref name="USPSTF-20111007">{{cite web |last1=Chou, MD |first1=Roger |last2=Croswell, MD, MPH |first2=Jennifer M. |last3=Dana, MLS |first3=Tracy |last4=Bougatous, BS |first4=Christina |last5=Blazina, MPH |first5=Ian |last6=Fu, PhD |first6=Rongwei |last7=Gleitsmann, MD, MPH |first7=Ken |last8=Koenig, MD, MPH |first8=Helen C. |last9=Lam, MD, MPH |first9=Clarence | displayauthors=8 |title=Screening for Prostate Cancer - A Review of the Evidence for the U.S. Preventive Services Task Force |url=http://www.uspreventiveservicestaskforce.org/uspstf12/prostate/prostateart.htm |date=7 October 2011 |publisher=] |accessdate=2011-10-08 }}</ref>
]
] (PSA) is secreted by the ] of the ] gland and can be detected in a sample of blood.<ref>{{cite book | title=American Society of Andrology Handbook | chapter=Chapter 8: What is the prostate and what is its function? | chapter-url=http://www.andrologysociety.com/resources/handbook/ch.8.asp | isbn=978-1-891276-02-6 | editor=Hellstrom WJG | year=1999 | publisher=American Society of Andrology | location=San Francisco | access-date=2018-02-28 | archive-date=2010-01-12 | archive-url=https://web.archive.org/web/20100112165648/http://www.andrologysociety.com/resources/handbook/ch.8.asp | url-status=dead }}</ref> PSA is present in small quantities in the ] of men with healthy prostates, but is often elevated in the presence of ] or other prostate disorders.<ref>{{cite journal | vauthors = Catalona WJ, Richie JP, Ahmann FR, Hudson MA, Scardino PT, Flanigan RC, deKernion JB, Ratliff TL, Kavoussi LR, Dalkin BL | title = Comparison of digital rectal examination and serum prostate specific antigen in the early detection of prostate cancer: results of a multicenter clinical trial of 6,630 men | journal = The Journal of Urology | volume = 151 | issue = 5 | pages = 1283–90 | date = May 1994 | pmid = 7512659 | doi = 10.1016/S0022-5347(17)35233-3 }}</ref> PSA is not a unique indicator of prostate cancer, but may also detect ] or ].<ref name="pmid23708103">{{cite journal | vauthors = Velonas VM, Woo HH, dos Remedios CG, Assinder SJ | title = Current status of biomarkers for prostate cancer | journal = International Journal of Molecular Sciences | volume = 14 | issue = 6 | pages = 11034–60 | date = May 2013 | pmid = 23708103 | pmc = 3709717 | doi = 10.3390/ijms140611034 | doi-access = free }}</ref>


A 2018 ] (USPSTF) recommendation adjusted the prior opposition to PSA screening,<ref name=Catalona2018/> suggesting shared decision-making regarding screening in healthy males 55 to 69 years of age.<ref name=Catalona2018>{{cite journal | vauthors = Catalona WJ | title = Prostate Cancer Screening | journal = The Medical Clinics of North America | volume = 102 | issue = 2 | pages = 199–214 | date = March 2018 | pmid = 29406053 | pmc = 5935113 | doi = 10.1016/j.mcna.2017.11.001 }}</ref> The recommendation for that age group states screening should only be done in those who wish it.<ref name=Gross2018>{{cite journal|last1=Grossman|first1=David C.|last2=Curry|first2=Susan J.|last3=Owens|first3=Douglas K.|author4-link=Kirsten Bibbins-Domingo|last4=Bibbins-Domingo|first4=Kirsten|last5=Caughey|first5=Aaron B.|last6=Davidson|first6=Karina W.|last7=Doubeni|first7=Chyke A.|last8=Ebell|first8=Mark|last9=Epling|first9=John W.|last10=Kemper|first10=Alex R.|last11=Krist|first11=Alex H.|last12=Kubik|first12=Martha|last13=Landefeld|first13=C. Seth|last14=Mangione|first14=Carol M.|last15=Silverstein|first15=Michael|last16=Simon|first16=Melissa A.|last17=Siu|first17=Albert L.|last18=Tseng|first18=Chien-Wen|title=Screening for Prostate Cancer|journal=JAMA|date=8 May 2018|volume=319|issue=18|pages=1901–1913|doi=10.1001/jama.2018.3710|pmid=29801017|quote=Clinicians should not screen men who do not express a preference for screening.|doi-access=free}}</ref> In those 70 and over, screening remains not recommended.<ref name=Gross2018/>
Hal Arkes presents the statistical case as follows:
<blockquote>
If there were two auditoriums each filled with 1,000 men, one filled with men who had taken PSA screening tests and the other with men who didn't take the test, there would be just as many men (8) "who died of prostate cancer in each auditorium, which leads us to think in the aggregate it didn't do any good." Among those who took the test there would also be 20 men who were treated for prostate cancers which never would have caused symptoms. Five of these men would have lifelong complications, including impotence and incontinence.<ref name="NPR">, With PSA Testing, The Power Of Anecdote Often Trumps Statistics, National Public Radio, May 28, 2012.</ref><ref>Hal R. Arkes and Wolfgang Gaissmaier, , Psychological Science.</ref>
</blockquote>


Screening with PSA has been associated with a number of harms including ], increased ] with associated harms, increased anxiety, and unneeded treatment.<ref>{{cite journal|last1=Stewart|first1=Rosalyn W.|last2=Lizama|first2=Sergio|last3=Peairs|first3=Kimberly|last4=Sateia|first4=Heather F.|last5=Choi|first5=Youngjee|title=Screening for prostate cancer|journal=Seminars in Oncology|date=February 2017|volume=44|issue=1|pages=47–56|doi=10.1053/j.seminoncol.2017.02.001|pmid=28395763}}</ref> The evidence surrounding prostate cancer screening indicates that it may cause little to no difference in mortality.<ref name=":7" />
This recommendation has been criticized by many prostate cancer experts for an over-reliance on findings of the U.S. Prostate, Lung, Colorectal and Ovarian (PLCO) Cancer Screening Trial.<ref>{{cite journal|last=Andriole|first=Gerald, et al|title=Mortality results from a randomized prostate-cancer screening trial|journal=N Engl J Med|year=2009|volume=360|pages=1310–9|pmid=19297565|doi=10.1056/NEJMoa0810696|pmc=2944770|last2=Crawford|first2=E. David|last3=Grubb|first3=Robert L.|last4=Buys|first4=Saundra S.|last5=Chia|first5=David|last6=Church|first6=Timothy R.|last7=Fouad|first7=Mona N.|last8=Gelmann|first8=Edward P.|last9=Kvale|first9=Paul A. | displayauthors=8 |issue=13}}</ref> This trial intended to randomize men between screening and no screening. However, because the study was initiated during a time when PSA screening was already becoming widely adopted, there were high rates of PSA testing among men who were in the control arm. This rate of "contamination" was very high: acknowledged by the authors to be 44% before the study started and 52% during the course of study. In fact, the rate was likely much higher, since over 90% of the prostate cancers found in the "control" arm were stage T1 or T2, which by definition can only be detected with screening.<ref>{{cite journal|last=Cooperberg|first=MR|author2=PR Carroll |title=Prostate cancer screening|journal=N Engl J Med|year=2009|volume=361|pages=203; author reply 204–5|pmid=19593852|issue=2|doi=10.1056/nejmc090849 }}</ref> The PLCO authors stated in a later publication that the PLCO should not be interpreted as a trial of screening vs. no screening, but rather as a trial of ''annual'' screening vs. so-called ''opportunistic'' or ad-hoc screening.<ref>{{cite journal|last=Pinsky|first=Paul|title=Assessing contamination and compliance in the prostate component of the Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial|journal=Clin Trials|year=2010|volume=7|pages=303–11|pmid=20571134|doi=10.1177/1740774510374091|issue=4|last2=Black|first2=A.|last3=Kramer|first3=B. S.|last4=Miller|first4=A.|last5=Prorok|first5=P. C.|last6=Berg|first6=C.|display-authors=etal}}</ref> The USPSTF also based their assessment of the "harms" of screening and treatment based on a biased and out-dated literature review. For just one example, their statement cited a 1:200 risk of dying within 30 days of radical prostatectomy. This number comes from men over the age of 65 treated in the early 1990s; the actual number in contemporary practice is closer to 1:10,000.<ref>{{cite journal|last=Tewari|first=A|author2=Sooriakumaran, P |author3=Bloch, DA |author4=Seshadri-Kreaden, U |author5=Hebert, AE |author6= Wiklund, P |title=Positive surgical margin and perioperative complication rates of primary surgical treatments for prostate cancer: a systematic review and meta-analysis comparing retropubic, laparoscopic, and robotic prostatectomy|journal=European Urology|date=July 2012|volume=62|issue=1|pages=1–15|pmid=22405509|doi=10.1016/j.eururo.2012.02.029}}</ref>


PSA testing of men in their mid-70s and older, is discouraged as most people at this age diagnosed with prostate cancer detected by a PSA test would die of other causes before the cancer caused problems.<ref>{{cite journal |vauthors=Scales C, Curtis L, Norris R, Schulman K, Albala D, Moul J | title = Prostate specific antigen testing in men older than 75 years in the United States | journal = J Urol | volume = 176 | issue = 2 | pages = 511–4 | year = 2006 | pmid = 16813879 | doi = 10.1016/j.juro.2006.03.060}}</ref> On the other hand, up to 25% of men diagnosed in their 70s or even 80s die of prostate cancer, ''if'' they have high-grade (i.e., aggressive) prostate cancer.<ref>{{cite journal|last=Lu-Yao|first=G, et al|journal=JAMA|volume=302|issue=11|pages=1202–9|pmid=19755699|doi=10.1001/jama.2009.1348|pmc=2822438|title=Outcomes of Localized Prostate Cancer Following Conservative Management|year=2009|last2=Albertsen|first2=PC|last3=Moore|first3=DF|last4=Shih|first4=W|last5=Lin|first5=Y|last6=Dipaola|first6=RS|last7=Barry|first7=MJ|last8=Zietman|first8=A|last9=O'Leary|first9=M | displayauthors=8 }}</ref> Conversely, some argue against PSA testing for men who are too young, because too many men would have to be screened to find one cancer, and too many men would have treatment for cancer that would not progress. This argument again ignores the fact that low-risk prostate cancer does not require immediate treatment, but may be amenable to active surveillance.<ref>{{cite journal|last=Cooperberg|first=MR|author2=Carroll, PR |author3=Klotz, L |title=Active surveillance for prostate cancer: progress and promise|journal=Journal of Clinical Oncology|date=Sep 20, 2011|volume=29|issue=27|pages=3669–76|pmid=21825257|doi=10.1200/JCO.2011.34.9738}}</ref> On the other hand, up to 25% of men diagnosed in their 70s or even 80s die of prostate cancer, ''if'' they have high-grade (i.e., aggressive) prostate cancer.<ref>{{cite journal | vauthors = Lu-Yao GL, Albertsen PC, Moore DF, Shih W, Lin Y, DiPaola RS, Barry MJ, Zietman A, O'Leary M, Walker-Corkery E, Yao SL | title = Outcomes of localized prostate cancer following conservative management | journal = JAMA | volume = 302 | issue = 11 | pages = 1202–9 | date = September 2009 | pmid = 19755699 | pmc = 2822438 | doi = 10.1001/jama.2009.1348 }}</ref> Conversely, some argue against PSA testing for men who are too young, because too many men would have to be screened to find one cancer, and too many men would have treatment for cancer that would not progress. Low-risk prostate cancer does not always require immediate treatment, but may be amenable to active surveillance.<ref name="Cooperberg MR 2011">{{cite journal | vauthors = Cooperberg MR, Carroll PR, Klotz L | title = Active surveillance for prostate cancer: progress and promise | journal = Journal of Clinical Oncology | volume = 29 | issue = 27 | pages = 3669–76 | date = September 2011 | pmid = 21825257 | doi = 10.1200/JCO.2011.34.9738 | s2cid = 24885033 | url = http://www.escholarship.org/uc/item/6fm7z10z | doi-access = free }}</ref> A PSA test cannot 'prove' the existence of prostate cancer by itself; varying levels of the antigen can be due to other causes.<ref name=":8" />


== Digital rectal examination ==
Prostate cancer is a common (by far the most common) solid-organ cancer diagnosed among men and surpassed only by lung cancer as a source of cancer mortality<ref>{{cite journal|last=Siegel|first=R|title=Cancer statistics, 2011: the impact of eliminating socioeconomic and racial disparities on premature cancer deaths|journal=CA Cancer J Clin|year=2011|volume=61|pages=212–36|pmid=21685461|doi=10.3322/caac.20121|last2=Ward|first2=Elizabeth|last3=Brawley|first3=Otis|last4=Jemal|first4=Ahmedin|issue=4|display-authors=etal}}</ref>). Prostate cancer is also extremely heterogeneous: many, perhaps most, prostate cancers are indolent and would never progress to a clinically meaningful stage if left undiagnosed and untreated during a man's lifetime. On the other hand, a subset are potentially lethal, and screening can identify some of these within a window of opportunity for cure<ref>{{cite journal|last=Esserman|first=Laura|title=Rethinking screening for breast cancer and prostate cancer|journal=JAMA|year=2009|volume=302|pages=1685–92|pmid=19843904|doi=10.1001/jama.2009.1498|issue=15|last2=Shieh|first2=Y|last3=Thompson|first3=I|display-authors=etal}}</ref> Thus the concept of PSA screening is advocated by some<ref>{{cite journal|last=Carroll|first=PR|title=Serum prostate-specific antigen for the early detection of prostate cancer: always, never, or only sometimes?|journal=J Clin Oncol|year=2011|volume=29|pages=345–7|pmid=21189396|doi=10.1200/JCO.2010.32.5308|issue=4|last2=Whitson|first2=J. M.|last3=Cooperberg|first3=M. R.|display-authors=etal}}</ref> as a means of detecting ''high-risk'', potentially lethal prostate cancer, with the understanding that lower-risk disease, if discovered, often does not need treatment and may be amenable to active surveillance.<ref>{{cite journal|last=Cooperberg|first=MR|title=Active surveillance for prostate cancer: progress and promise|journal=J Clin Oncol|year=2011|volume=29|pages=3669–76|pmid=21825257|doi=10.1200/JCO.2011.34.9738|issue=27|last2=Carroll|first2=P. R.|last3=Klotz|first3=L.|display-authors=etal}}</ref>
During a digital ] (DRE), a healthcare provider slides a gloved finger into the ] and presses on the prostate, to check its size and to detect any lumps on the accessible side. If the examination suggests anomalies, a PSA test is performed. If an elevated PSA level is found, a follow-up test is then performed.<ref name="NCI" />


A 2018 review recommended against primary care screening for prostate cancer with DRE due to the lack of evidence of the effectiveness of the practice.<ref name=Naji2018>{{cite journal|last1=Naji|first1=Leen|last2=Randhawa|first2=Harkanwal|last3=Sohani|first3=Zahra|last4=Dennis|first4=Brittany|last5=Lautenbach|first5=Deanna|last6=Kavanagh|first6=Owen|last7=Bawor|first7=Monica|last8=Banfield|first8=Laura|last9=Profetto|first9=Jason|title=Digital Rectal Examination for Prostate Cancer Screening in Primary Care: A Systematic Review and Meta-Analysis|journal=The Annals of Family Medicine|date=12 March 2018|volume=16|issue=2|pages=149–154|doi=10.1370/afm.2205|pmid=29531107|pmc=5847354}}</ref>
Screening for prostate cancer is controversial because of cost and uncertain long-term benefits to patients.<ref name="PSA-20111012">{{cite news |last=Marcione |first=Marilyn |title=Prostate testing's dark side: Men who were harmed |url=http://apnews.excite.com/article/20111012/D9QAUS2O0.html |publisher=] |date=12 October 2011 |accessdate=2011-10-13 }}</ref><ref name="pmid8971068">{{Cite journal|vauthors=Collins MM, Barry MJ | title = Controversies in prostate cancer screening. Analogies to the early lung cancer screening debate | journal = JAMA | volume = 276 | issue = 24 | pages = 1976–9 |date=December 1996 | pmid = 8971068 | doi = 10.1001/jama.276.24.1976}}</ref> Testing may lead to overdiagnosis and unnecessary treatment. Follow-up tests can include painful ] which can result in excessive bleeding and infection. The discoverer of PSA, Dr. ], concludes that the test's popularity "has led to a hugely expensive public health disaster," as only 16 percent of men will ever receive a diagnosis of prostate cancer, but only a 3 percent chance of dying from it. He states that "the test is hardly more effective than a coin toss."<ref name=Ablin/> Dr. Horan echos that sentiment in his book.<ref name=Horan>{{cite book|author=Anthony Horan|title=The Big Scare: The Business of Prostate Cancer|url=https://books.google.com/books?id=UlOUF4MpQ-8C|accessdate=18 August 2013|date=August 2009|publisher=STERLINGHOUSE|isbn=978-1-58501-119-3}}</ref>


The USPSTF recommends against digital rectal examination as a screening tool due to lack of evidence of benefits.<ref>{{Cite journal|last1=Tseng|first1=Chien-Wen|last2=Siu|first2=Albert L.|last3=Simon|first3=Melissa A.|last4=Silverstein|first4=Michael|last5=Mangione|first5=Carol M.|last6=Landefeld|first6=C. Seth|last7=Kubik|first7=Martha|last8=Krist|first8=Alex H.|last9=Kemper|first9=Alex R.|date=2018-05-08|title=Screening for Prostate Cancer: US Preventive Services Task Force Recommendation Statement|journal=JAMA|volume=319|issue=18|pages=1901–1913|doi=10.1001/jama.2018.3710|pmid=29801017|issn=0098-7484|doi-access=free}}</ref> Although DRE has long been used to diagnose prostate cancer, no controlled studies have shown a reduction in the morbidity or mortality of prostate cancer when detected by DRE at any age.<ref>{{Cite web|url=https://www.uptodate.com/contents/screening-for-prostate-cancer?topicRef=6939&source=see_link|title=UpToDate|website=www.uptodate.com|access-date=2019-02-07}}</ref><ref>{{Cite book|title=Campbell's Urology 8th Edition|year=2002|pages=Epstein JI. Pathology of prostatic neoplasia}}</ref>
According to the ], the controversy over prostate cancer should not surround the test, but rather how test results influence the decision to treat:
:"The decision to proceed to prostate biopsy should be based not only on elevated PSA and/or abnormal DRE results, but should take into account multiple factors including free and total PSA, patient age, PSA velocity, PSA density, family history, ethnicity, prior biopsy history and comorbidities.


The American Urological Association in 2018 stated that for men aged 55 to 69, they could find no evidence to support the continued use of DRE as a first-line screening test; however, in men referred for an elevated PSA, DRE may be a useful secondary test.<ref name="auanet.org">{{Cite web|url=https://www.auanet.org/guidelines/prostate-cancer-early-detection-guideline|title=Prostate Cancer: Early Detection Guideline - American Urological Association|website=www.auanet.org|access-date=2019-10-10|archive-date=2017-02-06|archive-url=https://web.archive.org/web/20170206160158/http://www.auanet.org/education/guidelines/prostate-cancer-detection.cfm|url-status=dead}}</ref>
:"A cancer cannot be treated if it is not detected. Not all prostate cancers require immediate treatment; active surveillance, in lieu of immediate treatment, is an option that should be considered for some men. Testing empowers patients and their urologists with the information to make an informed decision."<ref> ''The Medical News'', Nov. 4, 2009</ref>


A study by Krilaviciute et al. (2023)<ref>{{cite journal | url=https://pubmed.ncbi.nlm.nih.gov/37806841/ | pmid=37806841 | date=2023 | last1=Krilaviciute | first1=A. | last2=Becker | first2=N. | last3=Lakes | first3=J. | last4=Radtke | first4=J. P. | last5=Kuczyk | first5=M. | last6=Peters | first6=I. | last7=Harke | first7=N. N. | last8=Debus | first8=J. | last9=Koerber | first9=S. A. | last10=Herkommer | first10=K. | last11=Gschwend | first11=J. E. | last12=Meissner | first12=V. H. | last13=Benner | first13=A. | last14=Seibold | first14=P. | last15=Kristiansen | first15=G. | last16=Hadaschik | first16=B. | last17=Arsov | first17=C. | last18=Schimmöller | first18=L. | last19=Giesel | first19=F. L. | last20=Antoch | first20=G. | last21=Makowski | first21=M. | last22=Wacker | first22=F. | last23=Schlemmer | first23=H. P. | last24=Kaaks | first24=R. | last25=Albers | first25=P. | title=Digital Rectal Examination is Not a Useful Screening Test for Prostate Cancer | journal=European Urology Oncology | volume=6 | issue=6 | pages=S2588–9311(23)00203-1 | doi=10.1016/j.euo.2023.09.008 | s2cid=263773728 }}</ref> examined the effectiveness of the DRE as a standalone screening test for prostate cancer in >46,000 young men in Germany (age 45). It was found that DRE has a much lower detection rate for prostate cancer compared to PSA screening. Therefore, the authors recommend not to use DRE as a screening test for prostate cancer in young men, as it does not provide an improvement in detection compared to PSA screening.
Private medical institutes, such as the ], likewise acknowledge that "organizations vary in their recommendations about who should — and who shouldn't — get a PSA screening test." They conclude: "Ultimately, whether you should have a PSA test is something you'll have to decide after discussing it with your doctor, considering your risk factors and weighing your personal preferences."<ref> MayoClinic.com, updated March 6, 2010</ref>


== Follow-up tests ==
A study in Europe resulted in only a small decline in death rates and concluded that 48 men would need to be treated to save one life. But of the 47 men who were treated, most would be unable to ever again function sexually and require more frequent trips to the bathroom.<ref name=Ablin/><ref name=Horan/>


=== Biopsy ===
A study published in the ] found that over a 7 to 10-year period, "screening did not reduce the death rate in men 55 and over."<ref name=Ablin/><ref name=Horan/> Former screening proponents, including some from Stanford University, have come out against routine testing. In February 2010, the ] urged "more caution in using the test." And the ] concluded that "there was insufficient evidence to recommend routine screening."<ref name=Ablin/><ref name=Horan/>
] are considered the gold standard in detecting prostate cancer.<ref name="Borghesi_2017" /><ref name=":2" /> Infection after the biopsy procedure is a possible risk.<ref name=":3" /> MRI guided techniques have improved the diagnostic accuracy of the procedure.<ref name=":4" /><ref name=":5" /> Biopsies can be done through the ] or ].<ref>{{Cite web |date=2023-12-04 |title=Prostate Biopsy |url=https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/prostate-biopsy |website=www.hopkinsmedicine.org |access-date=2024-03-15}}</ref> The biopsy technique includes factors such as needle angle and prostate mapping method.<ref name=":10">{{Cite journal |last1=Harnden |first1=Patricia |last2=Shelley |first2=Michael D. |last3=Clements |first3=Hayley |last4=Coles |first4=Bernadette |last5=Tyndale-Biscoe |first5=R. Sandy |last6=Naylor |first6=Brian |last7=Mason |first7=Malcolm D. |date=January 2007 |title=The prognostic significance of perineural invasion in prostatic cancer biopsies: A systematic review |journal=Cancer |language=en |volume=109 |issue=1 |pages=13–24 |doi=10.1002/cncr.22388 |doi-access=free |pmid=17123267 |issn=0008-543X}}</ref> People who have localized cancer and perineural invasion may benefit more from immediate treatment rather than adopting a watchful waiting approach.<ref name=":10" />


===Expense=== === Ultrasound ===
] (TRUS) has the advantage of being fast and minimally invasive, and better than MRI for the evaluation of superficial tumor.<ref name="NCI" /> It also gives details about the layers of the rectal wall, accurate and useful for staging primary rectal cancer. While MRI is better in visualization of locally advanced and stenosing cancers, for staging perirectal lymph nodes, both TRUS and MRI are capable. TRUS has a small field of view, but 3D TRUS can improve the diagnosis of anorectal diseases.<ref>{{cite journal | vauthors = Kim MJ | title = Transrectal ultrasonography of anorectal diseases: advantages and disadvantages | journal = Ultrasonography | volume = 34 | issue = 1 | pages = 19–31 | date = January 2015 | pmid = 25492891 | pmc = 4282231 | doi = 10.14366/usg.14051 }}</ref>


=== Magnetic Resonance Imaging ===
The annual cost of PSA screening in the U.S. totals at least $3 billion, with much of it paid for by ] and the ].
MRI is used when screening suggests a malignancy.<ref name=":9">{{cite journal | vauthors = Sarkar S, Das S | title = A Review of Imaging Methods for Prostate Cancer Detection | journal = Biomedical Engineering and Computational Biology | volume = 7 | issue = Suppl 1 | pages = BECB.S34255 | date = 2016-03-02 | pmid = 26966397 | pmc = 4777886 | doi = 10.4137/BECB.S34255 }}</ref> This model potentially minimizes unnecessary prostate biopsies while maximizing biopsy yield.<ref>{{cite journal | vauthors = Bjurlin MA, Taneja SS | title = Standards for prostate biopsy | journal = Current Opinion in Urology | publisher = Curr Opin Urol | date=1 May 2015 | volume = 24 | issue = 2 | pages = 155–161 | doi=10.1097/MOU.0000000000000031 | pmid = 24451092| pmc = 4142196 }}</ref>{{dubious|date=March 2018}}{{citation needed|date=March 2018}} Despite concerns about the cost of MRI scans, compared to the long-term cost burden of the PSA/TRUS biopsy-based standard of care, the imaging model has been found to be cost-effective.{{dubious|date=March 2018}}{{citation needed|date=March 2018}} MRI imaging can be used for patients who have had a previous negative biopsy but their PSA continues to increase.<ref name=TurkbeyChoyke2018>{{cite journal|last1=Turkbey|first1=Baris|last2=Choyke|first2=Peter L.|title=Future Perspectives and Challenges of Prostate MR Imaging|journal=Radiologic Clinics of North America|volume=56|issue=2|year=2018|pages=327–337|issn=0033-8389|doi=10.1016/j.rcl.2017.10.013|pmid=29420986|pmc=5808592}}</ref> Consensus has not been determined as to which of the MRI-targeted biopsy techniques is more useful.<ref name=GigantiMoore2017>{{cite journal|last1=Giganti|first1=Francesco|last2=Moore|first2=Caroline M.|title=A critical comparison of techniques for MRI-targeted biopsy of the prostate|journal=Translational Andrology and Urology|volume=6|issue=3|year=2017|pages=432–443|issn=2223-4683|doi=10.21037/tau.2017.03.77|pmid=28725585|pmc=5503959 |doi-access=free }}</ref> In a study involving 400 men aged 50 – 69, MRI screening identified more men with prostate cancer than PSA tests or ultrasound and did not increase the number of men who needed a biopsy.<ref>{{Cite journal |last1=Eldred-Evans |first1=David |last2=Burak |first2=Paula |last3=Connor |first3=Martin J. |last4=Day |first4=Emily |last5=Evans |first5=Martin |last6=Fiorentino |first6=Francesca |last7=Gammon |first7=Martin |last8=Hosking-Jervis |first8=Feargus |last9=Klimowska-Nassar |first9=Natalia |last10=McGuire |first10=William |last11=Padhani |first11=Anwar R. |last12=Prevost |first12=A. Toby |last13=Price |first13=Derek |last14=Sokhi |first14=Heminder |last15=Tam |first15=Henry |date=2021-03-01 |title=Population-Based Prostate Cancer Screening With Magnetic Resonance Imaging or Ultrasonography: The IP1-PROSTAGRAM Study |url=https://jamanetwork.com/journals/jamaoncology/fullarticle/2776224 |journal=JAMA Oncology |language=en |volume=7 |issue=3 |pages=395–402 |doi=10.1001/jamaoncol.2020.7456 |issn=2374-2437 |pmc=7879388 |pmid=33570542}}</ref><ref>{{Cite journal |date=13 March 2024 |title=MRI screening for prostate cancer shows promise |url=https://evidence.nihr.ac.uk/alert/mri-screening-for-prostate-cancer-shows-promise/ |journal=NIHRE Evidence|doi=10.3310/nihrevidence_62211 }}</ref> A large-scale trial of MRI screening, TRANSFORM, began in the UK in spring 2024.<ref>{{Cite web |title=TRANSFORM trial |url=https://prostatecanceruk.org/research/transform-trial/ |access-date=2024-04-12 |website=Prostate Cancer UK }}</ref>


=== Other imaging ===
According to Ablin, "testing should absolutely not be deployed to screen the entire population of men over the age of 50 . . ." He concludes that the primary promoters of tests are drug companies, which "continue peddling the tests," along with advocacy groups including the ], all of which "stand to profit" by pushing continual tests. He states:


]-PSMA PET/CT imaging has become, in a relatively short period of time, the gold standard for restaging recurrent prostate cancer in clinical centers in which this imaging modality is available.<ref name=LenzoMeyrick2018/> It is likely to become the standard imaging modality in the staging of intermediate-to-high risk primary prostate cancer.<ref name=LenzoMeyrick2018/> The potential to guide therapy, and to facilitate more accurate prostatic biopsy is being explored.<ref name=LenzoMeyrick2018/> In the theranostic paradigm, <sup>68</sup>Ga-PSMA PET/CT imaging is critical for detecting prostate specific membrane antigen-avid disease which may then respond to targeted ]-PSMA or ]-PSMA therapies.<ref name=LenzoMeyrick2018>{{cite journal | vauthors = Lenzo NP, Meyrick D, Turner JH | title = Review of Gallium-68 PSMA PET/CT Imaging in the Management of Prostate Cancer | journal = Diagnostics | volume = 8 | issue = 1 | date = February 2018 | pmid = 29439481 | pmc = 5871999 | doi = 10.3390/diagnostics8010016 | page=16| doi-access = free }}{{CC-notice|cc=by4|url=http://www.mdpi.com/2075-4418/8/1/16/htm|author(s)=Nat P. Lenzo, Danielle Meyrick, and J. Harvey Turner}}</ref> For local recurrence, <sup>68</sup>Ga-PSMA PET/MR or PET/CT in combination with mpMR is most appropriate.<ref name=VirgoliniDecristoforo2018>{{cite journal | vauthors = Virgolini I, Decristoforo C, Haug A, Fanti S, Uprimny C | title = Current status of theranostics in prostate cancer | journal = European Journal of Nuclear Medicine and Molecular Imaging | volume = 45 | issue = 3 | pages = 471–495 | date = March 2018 | pmid = 29282518 | doi = 10.1007/s00259-017-3882-2 | pmc=5787224}}{{CC-notice|cc=by4|url=https://link.springer.com/article/10.1007%2Fs00259-017-3882-2|author(s)=Irene Virgolini, Clemens Decristoforo, Alexander Haug, Stefano Fanti, and Christian Uprimny}}</ref> PSMA PET/CT may be potentially helpful for locating the cancer when combined with multiparametric MRI (mpMRI) for primary prostate care.<ref name=BoucheloucheChoyke2018>{{cite journal|last1=Bouchelouche|first1=Kirsten|last2=Choyke|first2=Peter L.|title=Advances in prostate-specific membrane antigen PET of prostate cancer|journal=Current Opinion in Oncology|volume=30|issue=3|year=2018|pages=189–196|issn=1040-8746|doi=10.1097/CCO.0000000000000439|pmid=29465429|pmc=6003670}}</ref> Prostate multiparametric MR imaging (mpMRI) is helpful in evaluating recurrence of primary prostate cancer following treatment.<ref name=GaurTurkbey2018>{{cite journal|last1=Gaur|first1=Sonia|last2=Turkbey|first2=Baris|title=Prostate MR Imaging for Posttreatment Evaluation and Recurrence|journal=Radiologic Clinics of North America|volume=56|issue=2|year=2018|pages=263–275|issn=0033-8389|doi=10.1016/j.rcl.2017.10.008|pmid=29420981|pmc=5844499}}</ref>
:"I never dreamed that my discovery four decades ago would lead to such a profit-driven public health disaster. The medical community must confront reality and stop the inappropriate use of P.S.A. screening. Doing so would save billions of dollars and rescue millions of men from unnecessary, debilitating treatments."<ref name="Ablin">{{Cite news| url = https://www.nytimes.com/2010/03/10/opinion/10Ablin.html | title = The Great Prostate Mistake | author = Ablin RJ | date = 2010-03-09 | work = ] }}</ref><ref name=Horan/>


=== Other ===
Ablin has also written: “it is prudent only to use a single PSA determination as a baseline, with biopsy and cancer treatment reserved for those with significant PSA changes over time, or for those with clinical manifestations mandating immediate therapy..... absolute levels of PSA are rarely meaningful; it is the relative change in PSA levels over time that provides insight, but not definitive proof of a cancerous condition necessitating therapy.“.<ref>{{cite journal |vauthors=Haythorn MR, Ablin RJ | date = Aug 2011 | title = Prostate-specific antigen testing across the spectrum of prostate cancer | url = | journal = Biomark Med. | volume = 5 | issue = 4| pages = 515–26 | doi = 10.2217/bmm.11.53 | pmid = 21861672 }}</ref>
A number of ]s (blood, urine and tissue based tests) for screening, diagnosing and determining the prognosis of prostate cancer are supported by evidence and used widely.<ref name="KretschmerTilki2017" /><ref name=":0">{{Cite journal |last1=Eskra |first1=Jillian N. |last2=Rabizadeh |first2=Daniel |last3=Pavlovich |first3=Christian P. |last4=Catalona |first4=William J. |last5=Luo |first5=Jun |date=September 2019 |title=Approaches to urinary detection of prostate cancer |journal=Prostate Cancer and Prostatic Diseases |language=en |volume=22 |issue=3 |pages=362–381 |doi=10.1038/s41391-019-0127-4 |pmc=6640078 |pmid=30655600}}</ref>
* EpiSwitch® PSE is a blood test used for screening and diagnosing prostate cancer utilizing epigenetic markers to identify specific changes in regulatory looping structures (]) associated with prostate cancer. Used in conjunction with a PSA test, the PSE test boosts accuracy from 55% to 94% offering a more effective and precise method for detecting and diagnosing prostate cancer.<ref>{{cite journal |vauthors=Pchejetski D, Hunter E, Dezfouli M, Salter M, Powell R, Green J, Naithani T, Koutsothanasi C, Alshaker H, Jaipuria J, Connor MJ, Eldred-Evans D, Fiorentino F, Ahmed H, Akoulitchev A, Winkler M |title=Circulating Chromosome Conformation Signatures Significantly Enhance PSA Positive Predicting Value and Overall Accuracy for Prostate Cancer Detection |journal=Cancers (Basel) |volume=15 |issue=3 |pages=821 |date=January 2023 |pmid=36765779 |pmc=9913359 |doi=10.3390/cancers15030821 |doi-access=free}}</ref>
* The 4Kscore combines total, free and intact PSA together with human ].<ref name="RendonMason2017" /> It is used to try to determine the risk of a Gleason score greater than 6.<ref name="RendonMason2017" />
* The ] (PHI) is a PSA-based blood test for early prostate cancer screening. It may be used to determine when a biopsy is needed.<ref name=":9" /><ref name="RendonMason2017" />
* Prostate cancer antigen 3 (]) is a urine test that detects the overexpression of the PCA3 gene, an indicator of prostate cancer.<ref name=":9" /><ref name="RendonMason2017">{{cite journal | vauthors = Rendon RA, Mason RJ, Marzouk K, Finelli A, Saad F, So A, Violette P, Breau RH | title = Canadian Urological Association recommendations on prostate cancer screening and early diagnosis| journal = Canadian Urological Association Journal| volume = 11 | issue = 10 | pages = 298–309 | date = October 2017 | pmid = 29381452 | doi = 10.5489/cuaj.4888 | pmc=5659858}}</ref><ref>Progensa PCA3 Assay . 502083-IFU-PI, Rev. 001. San Diego, CA: Hologic, Inc.; 2015.</ref><ref name=":0" />
* ConfirmMDx is performed on tissue taken during a prostate biopsy. The test identifies men with clinically significant prostate cancer who would benefit from further testing and treatment. It can also help men without significant prostate cancer avoid unnecessary repeat biopsies.<ref name=KretschmerTilki2017>{{cite journal|last1=Kretschmer|first1=Alexander|last2=Tilki|first2=Derya|title=Biomarkers in prostate cancer – Current clinical utility and future perspectives|journal=Critical Reviews in Oncology/Hematology|volume=120|year=2017|pages=180–193|issn=1040-8428|doi=10.1016/j.critrevonc.2017.11.007|pmid=29198331}}</ref>


Researchers at the Korea Institute of Science and Technology (KIST) developed a urinary multi marker sensor with the ability to measure trace amounts of biomarkers from naturally voided urine.<ref name="Noninvasive Precision Screening of">{{cite journal |last1=Kim |first1=Hojun |last2=Park |first2=Sungwook |last3=Jeong |first3=In Gab |last4=Song |first4=Sang Hoon |last5=Jeong |first5=Youngdo |last6=Kim |first6=Choung-Soo |last7=Lee |first7=Kwan Hyi |title=Noninvasive Precision Screening of Prostate Cancer by Urinary Multimarker Sensor and Artificial Intelligence Analysis |journal=ACS Nano |date=9 December 2020 |volume=15 |issue=3 |pages=4054–65 |doi=10.1021/acsnano.0c06946|pmid=33296173 |s2cid=228089390 }}</ref> The correlation of clinical state with the sensing signals form urinary multi markers was analyzed by two machine learning algorithms, random forest and neural network. Both algorithms provided a monotonic increase in screening performance as the number of biomarkers was increased. With the best combination of biomarkers, the algorithms were able to screen prostate cancer patients with more than 99% accuracy.<ref name="Noninvasive Precision Screening of"/>
==Clinical practice guidelines==
]s for prostate cancer ] are controversial because the benefits of screening may not outweigh the risks of follow-up diagnostic tests and cancer treatments:<ref name="Gomella2011">{{Cite journal |vauthors=Gomella LG, Liu XS, Trabulsi EJ, Kelly WK, Myers R, Showalter T, Dicker A, Wender R | title = Screening for prostate cancer: The current evidence and guidelines controversy | journal = The Canadian journal of urology | volume = 18 | issue = 5 | pages = 5875–5883 | year = 2011 | pmid = 22018148}}</ref>
* The ] (]) recommended against PSA screening in healthy men in October 2011 finding that the potential risks outweigh the potential benefits.<ref name="GHarris" /> This recommendation, released in October 2011, is based on a review of evidence and concludes that "prostate-specific antigen–based screening results in small or no reduction in prostate cancer–specific mortality and is associated with harms related to subsequent evaluation and treatments, some of which may be unnecessary."<ref name="USPSTF-20111007" />
* ], in its cancer screening guidelines says that it does not support routine screening for prostate cancer.<ref name="acs"></ref> This is because the benefits are unclear or unproven.<ref>http://www.cancer.org/docroot/MED/content/MED_2_1x_A_Special_Message_from_CEO_John_Seffrin_PhD_on_Cancer_Screening.asp?sitearea=MED</ref> Instead it recommends that doctors discuss the pros and cons of testing and that men should be offered the possibility of a DRE and a PSA test if they are over 50 with a life expectancy of more than 10 years (or over 40 if they are in a high-risk group). It recommends that men should sit down with their physician and weigh the benefits and risks of the test before a decision is made.<ref name="acs"/> Men at high risk for prostate cancer such as African-American men should discuss this with their doctor at age 45. Men who have a first-degree relative (father, brother, or son) diagnosed with prostate cancer at an early age (younger than age 65) and men with several first-degree relatives diagnosed at an early age should begin the discussion at age 40.<ref name="cancer.org"/>


==Guidelines==
The American Urological Association said in early 2009 that "The decision to screen is one that a man should make in conjunction with his physician, and should incorporate known prostate cancer risk factors, such as family history of prostate cancer, age, ethnicity/race, and whether or not a man has had a previous negative prostate biopsy. These factors are different for every man and, therefore, the benefits of screening should be considered in the broader perspective."<ref>http://www.auanet.org/content/press/press_releases/article.cfm?articleNo=106 AUA statement March 2009 following publication of U.S. and European large scale screening effectiveness trial results</ref> The organization will review its best practice guidelines later in 2009.
* In 2012 the ] (USPSTF) recommended against prostate cancer screening using PSA.<ref>{{cite web|title=Final Update Summary: Prostate Cancer: Screening - US Preventive Services Task Force|url=https://www.uspreventiveservicestaskforce.org/Page/Document/UpdateSummaryFinal/prostate-cancer-screening|website=www.uspreventiveservicestaskforce.org|access-date=2 March 2018}}</ref> As of 2018 a draft for new recommendations suggests that screening be individualized for those between the ages of 55 to 69. It notes a small potential decrease in the risk of dying from prostate cancer, but harm from overtreatment.<ref name=USPSTF2018/> In those over the age of 70, PSA based screening is still recommended against.<ref name=USPSTF2018>{{cite web|title=Home Page - USPSTF Draft Prostate Screening Recommendations|url=https://screeningforprostatecancer.org/|website=USPSTF Draft Prostate Screening Recommendations|access-date=2 March 2018|archive-url=https://web.archive.org/web/20180302225801/https://screeningforprostatecancer.org/|archive-date=2 March 2018|url-status=dead}}</ref>
* The 2008 recommendations of the ] (USPSTF) concluded that routine screening for prostate cancer using PSA testing or digital rectal examination (DRE) was not recommended for men over 75 and that the evidence was insufficient to recommend for or against screening for men under 75 years old.<!--
* The ] "recommends that asymptomatic men who have at least a 10-year life expectancy have an opportunity to make an informed decision with their health care provider about screening for prostate cancer after they receive information about the uncertainties, risks, and potential benefits associated with prostate cancer screening. Prostate cancer screening should not occur without an informed decision-making process. Men at average risk should receive this information beginning at age 50 years. Men in higher risk groups should receive this information before age 50 years. Men should either receive this information directly from their health care providers or be referred to reliable and culturally appropriate sources."<ref>{{cite journal | vauthors = Wolf AM, Wender RC, Etzioni RB, Thompson IM, D'Amico AV, Volk RJ, Brooks DD, Dash C, Guessous I, Andrews K, DeSantis C, Smith RA | title = American Cancer Society guideline for the early detection of prostate cancer: update 2010 | journal = CA: A Cancer Journal for Clinicians | volume = 60 | issue = 2 | pages = 70–98 | pmid = 20200110 | doi = 10.3322/caac.20066 | year=2010| s2cid = 21548482 | doi-access = free }}</ref>
--><ref name="USPSTF 2002">{{cite web |author=] |date=December 2002 |title=Screening for Prostate Cancer |publisher=] |url=http://www.ahrq.gov/clinic/uspstf/uspsprca.htm}}
* Other guidelines and centers specializing in treating prostate cancer recommend obtaining a PSA in all men at age 45.<ref name=FleshnerCarlsson2016/> This is based on emerging data indicating that an increased baseline PSA can be used to detect future significant disease.<ref name=FleshnerCarlsson2016>{{cite journal|last1=Fleshner|first1=Katherine|last2=Carlsson|first2=Sigrid V.|last3=Roobol|first3=Monique J.|title=The effect of the USPSTF PSA screening recommendation on prostate cancer incidence patterns in the USA|journal=Nature Reviews Urology|volume=14|issue=1|year=2016|pages=26–37|issn=1759-4812|doi=10.1038/nrurol.2016.251|pmc=5341610|pmid=27995937}}</ref>
{{cite journal |author=] |date=December 3, 2002 |title=Screening for prostate cancer: recommendation and rationale |journal=] |volume=137 |issue=11 |pages=915–6 |pmid=12458992 |url=http://www.annals.org/cgi/reprint/137/11/915.pdf|format=PDF |doi=10.7326/0003-4819-137-11-200212030-00005}}<br>
* The American Urological Association in 2018 states that men under the age of 55 and over the age of 69 should not be routinely screened. The greatest benefit of screening appears to be in men ages 55 to 69 years. To reduce the harms of screening, a routine screening interval of two years or more may be preferred over annual screening in those men who have participated in shared decision-making and decided on screening. Screening is done by PSA (blood test).<ref name="auanet.org"/>
{{cite journal |vauthors=Harris R, Lohr KN |date=December 3, 2002 |title=Screening for prostate cancer: an update of the evidence for the U.S. Preventive Services Task Force |journal=] |volume=137 |issue=11 |pages=917–29 |pmid=12458993 |url=http://www.annals.org/cgi/reprint/137/11/917.pdf|format=PDF |doi=10.7326/0003-4819-137-11-200212030-00014}}</ref> The previous 1995 USPSTF recommendation was against routine screening.
* As of 2018, the UK ] did not offer general PSA screening, for similar reasons to those given above. Individuals over the age of 50 who request it can normally obtain testing covered by the NHS.<ref name=":8">{{cite web|title=Prostate cancer - PSA testing - NHS Choices|url=http://www.nhs.uk/Conditions/Cancer-of-the-prostate/Pages/Prevention.aspx|publisher=NHS Choices|date=3 January 2015}}</ref>
* The ] (ACS) has recently updated its guidelines making clear that it does not recommend routine prostate cancer screening for all men.<ref name="ACS2009"></ref> It recommends that the risks and benefits of screening need to be weighed, and discussions should start early for those in high-risk groups. Screening should take place only wíth informed consent of the patient in full knowledge of both benefits and risks. The revised guidelines reflect the concerns about the potentially down-played risks and over-blown claims for the success of prostate cancer screening.<ref>{{cite news |url=https://www.nytimes.com/2009/10/21/health/21cancer.html?_r=2&ref=todayspaper |title=NY Times article:Cancer Society, in Shift, Has Concerns on Screenings |date=20 Oct 2009 | work=The New York Times |first=Gina |last=Kolata}}</ref><ref>{{cite news |url=http://latimesblogs.latimes.com/booster_shots/2009/10/american-cancer-society-breast-prostate-cancer-screening.html |title=LA Times article:Did the American Cancer Society really change its tune on screening? |date=21 Oct 2009 | work=Los Angeles Times}}</ref>
* The Canadian Urological Association in 2017 suggested screening be offered as a possibility to those who are expected to live more than 10 years, with the final decision based on shared decision making.<ref name="RendonMason2017" /> They recommend a starting age for most people at 50, and age 45 among those at high risk.<ref name="RendonMason2017" /> The Canadian Task Force on Preventive Health Care in 2014 strongly recommended against screening in those under 55 and over 70 years of age.<ref name=CMAJ2014/> They weakly recommended against screening among those 55–69.<ref name=CMAJ2014>{{cite journal |vauthors=Bell N, Connor Gorber S, Shane A, Joffres M, Singh H, Dickinson J, Shaw E, Dunfield L, Tonelli M |collaboration=Canadian Task Force on Preventive Health Care |title=Recommendations on screening for prostate cancer with the prostate-specific antigen test |journal=Canadian Medical Association Journal |date=4 November 2014 |volume=186 |issue=16 |pages=1225–34 |doi=10.1503/cmaj.140703 |pmid=25349003 |pmc=4216256}}</ref>
* Some men have ] associated with prostate cancer development (e.g., ]1, ], ]). Screening and its frequency is established after consulting with a geneticist.<ref name="RendonMason2017" />


== Controversy ==
<blockquote>
Screening for prostate cancer continues to generate debate among clinicians and broader lay audiences.<ref name="Sadi2017">{{cite journal|last1=Sadi|first1=Marcus V.|year=2017|title=PSA screening for prostate cancer|journal=Revista da Associação Médica Brasileira|volume=63|issue=8|pages=722–725|doi=10.1590/1806-9282.63.08.722|issn=0104-4230|pmid=28977112|doi-access=free}}</ref> Publications authored by governmental, non-governmental and medical organizations continue the debate and publish recommendations for screening.<ref name=":7">{{cite journal | vauthors = Ilic D, Neuberger MM, Djulbegovic M, Dahm P | title = Screening for prostate cancer | journal = The Cochrane Database of Systematic Reviews | issue = 1 | pages = CD004720 | date = January 2013 | volume = 2013 | pmid = 23440794 | doi = 10.1002/14651858.cd004720.pub3 | pmc = 8406915 }}</ref> One in six men will be diagnosed with prostate cancer during their lifetime but screening may result in the overdiagnosis and overtreatment of prostate cancer.<ref name=":6" /><ref>{{cite journal | vauthors = Ashley VA, Joseph MB, Kamlesh KY, Shalini SY, Ashutosh KT, Joseph R | title = The Use of Biomarkers in Prostate Cancer Screening and Treatment | journal = Reviews in Urology | volume = 19 | issue = 4 | pages = 221–234 | date = 2017 | pmid = 29472826 | pmc = 5811879 | doi = 10.3909/riu0772 | doi-broken-date = 1 November 2024 }}</ref> Though the death rates from prostate cancer continue to decline, 238,590 men were diagnosed with prostate cancer in the United States in 2013 while 29,720 died as a result. Death rates from prostate cancer have declined at a steady rate since 1992. Cancers of the prostate, lung and bronchus, and colorectum accounted for about 50% of all newly diagnosed cancers in American men in 2013, with prostate cancer constituting 28% of cases. Screening for prostate cancer varies by state and indicates differences in the use of screening for prostate cancer as well as variations between locales. Out of all cases of prostate cancer, African American men have an incidence of 62%. African American men are less likely to receive standard therapy for prostate cancer. This discrepancy may indicate that if they were to receive higher quality cancer treatment their survival rates would be similar to whites.<ref name=":6">{{cite journal | vauthors = Siegel R, Naishadham D, Jemal A | title = Cancer statistics, 2013 | journal = CA: A Cancer Journal for Clinicians | volume = 63 | issue = 1 | pages = 11–30 | date = January 2013 | pmid = 23335087 | doi = 10.3322/caac.21166 | s2cid = 24926725 | doi-access = free }}</ref>
:''The American Cancer Society (ACS) does not support routine testing for prostate cancer at this time. ACS does believe that health care professionals should discuss the potential benefits and limitations of prostate cancer early detection testing with men before any testing begins. This discussion should include an offer for testing with the prostate-specific antigen (PSA) blood test and digital rectal exam (DRE) yearly, beginning at age 50, to men who are at average risk of prostate cancer and have at least a 10-year life expectancy. Following this discussion, those men who favor testing should be tested. Men should actively take part in this decision by learning about prostate cancer and the pros and cons of early detection and treatment of prostate cancer. This discussion should take place starting at age 45 for men at high risk of developing prostate cancer. This includes African American men and men who have a first-degree relative (father, brother, or son) diagnosed with prostate cancer at an early age (younger than age 65). This discussion should take place at age 40 for men at even higher risk (those with several first-degree relatives who had prostate cancer at an early age). If, after this discussion, a man asks his health care professional to make the decision for him, he should be tested (unless there is a specific reason not to test).'' <ref name="ACS2009"/>
</blockquote>
* Some U.S. radiation oncologists and medical oncologists who specialize in treating prostate cancer recommend obtaining a baseline PSA in all men at age 35<!--
--><ref name="D'Amico 2004">{{cite web |date=July 2004 |title=Study suggests value of regular PSA tests for tracking prostate cancer |publisher=] |url=http://www.hms.harvard.edu/news/pressreleases/df/0704prostate_test.html}}
{{cite journal |author=Kladko B |date=August 15, 2005 |title=Prostate cancer test gets another look |journal=] |url=http://www.boston.com/yourlife/health/men/articles/2005/08/15/prostate_cancer_test_gets_another_look/?page=full}}</ref> or beginning annual PSA testing in high risk men at age 35.<!--
--><ref name="Strum 2005">{{cite journal |vauthors=Strum SB, Pogliano D |date=May 2005 |title=What every doctor who treats male patients should know |journal=PCRI Insights |volume=8 |issue=2 |pages=4–5 |url=http://www.prostate-cancer.org/resource/pdf/Is8-2.pdf|format=PDF}}</ref>
* The American Urological Association Patient Guide to Prostate Cancer.<!--
--><ref name="AUA Patient Guide 2008">{{cite web |author=] |year=2008 |title=Prostate Cancer Patient Guide |work=AUA Patient Guidelines |url=http://www.auanet.org/guidelines/patient_guides/pc08.pdf|format=PDF}}</ref>


Prostate cancer is also extremely heterogeneous: most prostate cancers are indolent and would never progress to a clinically meaningful stage if left undiagnosed and untreated during a man's lifetime. On the other hand, a subset are potentially lethal, and screening can identify some of these within a window of opportunity for cure.<ref>{{cite journal | vauthors = Esserman L, Shieh Y, Thompson I | title = Rethinking screening for breast cancer and prostate cancer | journal = JAMA | volume = 302 | issue = 15 | pages = 1685–92 | date = October 2009 | pmid = 19843904 | doi = 10.1001/jama.2009.1498 | s2cid = 25598632 }}</ref> Thus, PSA screening is advocated by some as a means of detecting ''high-risk'', potentially lethal prostate cancer, with the understanding that lower-risk disease, if discovered, often does not need treatment and may be amenable to active surveillance.<ref name="Cooperberg MR 2011" /><ref>{{cite journal | vauthors = Carroll PR, Whitson JM, Cooperberg MR | title = Serum prostate-specific antigen for the early detection of prostate cancer: always, never, or only sometimes? | journal = Journal of Clinical Oncology | volume = 29 | issue = 4 | pages = 345–7 | date = February 2011 | pmid = 21189396 | doi = 10.1200/JCO.2010.32.5308 | s2cid = 20098979 | url = http://www.escholarship.org/uc/item/26s2t3m9 | doi-access = free }}</ref>
Since there is no general agreement that the benefits of PSA screening outweigh the harms, the consensus is that clinicians use a process of shared decision-making that includes discussing with patients the risks of prostate cancer, the potential benefits and harms of screening, and involving the patients in the decision.<!--
--><ref name="Ross 2004">{{cite journal |vauthors=Ross LE, Coates RJ, Breen N, Uhler RJ, Potosky AL, Blackman D |year=2004 |title=Prostate-specific antigen test use reported in the 2000 National Health Interview Survey |journal=Prev Med |volume=38 |issue=6 |pages=732–44 |pmid=15193893 | doi = 10.1016/j.ypmed.2004.01.005}}</ref>


Screening for prostate cancer is controversial because of cost and uncertain long-term benefits to patients.<ref name="pmid8971068">{{cite journal | vauthors = Collins MM, Barry MJ | title = Controversies in prostate cancer screening. Analogies to the early lung cancer screening debate | journal = JAMA | volume = 276 | issue = 24 | pages = 1976–9 | date = December 1996 | pmid = 8971068 | doi = 10.1001/jama.276.24.1976 }}</ref> Horan echos that sentiment in his book.<ref name=Horan>{{cite book|author=Anthony Horan|title=The Big Scare: The Business of Prostate Cancer|url=https://books.google.com/books?id=UlOUF4MpQ-8C|access-date=18 August 2013|date=August 2009|publisher=STERLINGHOUSE|isbn=978-1-58501-119-3}}</ref> Private medical institutes, such as the ], likewise acknowledge that "organizations vary in their recommendations about who should – and who shouldn't – get a PSA screening test." They conclude: "Ultimately, whether you should have a PSA test is something you'll have to decide after discussing it with your doctor, considering your risk factors and weighing your personal preferences."<ref> MayoClinic.com, updated March 6, 2010</ref>
As of 2015 the UK ] did not offer PSA screening, on the basis that it is not reliable.<ref>{{cite web|title=Prostate cancer - PSA testing - NHS Choices|url=http://www.nhs.uk/Conditions/Cancer-of-the-prostate/Pages/Prevention.aspx|publisher=NHS Choices|language=en|date=3 January 2015}}</ref>


A 2009 study in Europe resulted in only a small decline in death rates and concluded that 48 men would need to be treated to save one life. But of the 47 men who were treated, most would be unable to ever again function sexually and would require more frequent trips to the bathroom.<ref name="Horan" />{{Page needed|date=April 2021}} Aggressive marketing of screening tests by drug companies has also generated controversy as has the advocacy of testing by the ].<ref name="Horan" />
==Research==
In the European Randomized Study of Screening for Prostate Cancer (ERSPC) initiated in the early 1990s, the intention was to evaluate the effect of screening with prostate-specific antigen (PSA) testing on death rates from prostate cancer. The trial involved 182,000 men between the ages of 50 and 74 years in seven European countries randomly assigned to a group that was offered PSA screening at an average of once every 4 years or to a control group that did not receive such screening. During a ] of almost 9 years, the cumulative detected incidence of prostate cancer was 820 per 10,000 in the screening group and 480 per 10,000 in the control group. Deaths from these cancers in this time was much lower. There were 214 prostate cancer deaths in the screening group and 326 in the control group, a difference of 7.1 men per 10,000 in the tested group compared to the control. The researchers concluded that PSA-based screening did reduce the rate of death from prostate cancer by 20%, but that this was associated with a high risk of overdiagnosis, which means that 1410 men would need to be screened and 48 additional cases of prostate cancer would need to be treated to prevent just one death from prostate cancer within 9 years. However, the number needed to treat to prevent one progression to metastatic disease was only 24, and both numbers are expected to fall as patients in the study are followed for longer periods of time.<ref name="Schröder, 1320">{{cite journal|last1=Schröder|first1=Fritz H.|last2=Hugosson|first2=Jonas|last3=Roobol|first3=Monique J.|last4=Tammela|first4=Teuvo L.J.|last5=Ciatto|first5=Stefano|last6=Nelen|first6=Vera|last7=Kwiatkowski|first7=Maciej|last8=Lujan|first8=Marcos|last9=Lilja|first9=Hans|last10=Zappa|first10=Marco|last11=Denis|first11=Louis J.|last12=Recker|first12=Franz|last13=Berenguer|first13=Antonio|last14=Määttänen|first14=Liisa|last15=Bangma|first15=Chris H.|last16=Aus|first16=Gunnar|last17=Villers|first17=Arnauld|last18=Rebillard|first18=Xavier|last19=van der Kwast|first19=Theodorus|last20=Blijenberg|first20=Bert G.|last21=Moss|first21=Sue M.|last22=de Koning|first22=Harry J.|last23=Auvinen|first23=Anssi|title=Screening and Prostate-Cancer Mortality in a Randomized European Study|journal=New England Journal of Medicine|date=26 March 2009|volume=360|issue=13|pages=1320–1328|doi=10.1056/NEJMoa0810084|pmid=19297566}}</ref> Furthermore, the benefit for screening was greater (30% rather than 20%) with adjustment for noncompliance and contamination (i.e., men who were randomized to get PSA tests but did not, and those who were in the control arm but actually received PSA tests during the study period).<ref>{{cite journal|last=Roobol|first=Monique|title=Prostate Cancer Mortality Reduction by Prostate-Specific Antigen–Based Screening Adjusted for Nonattendance and Contamination in the European Randomised Study of Screening for Prostate Cancer (ERSPC)|journal=Eur Urol|year=2009|volume=56|pages=584–91|pmid=19660851|doi=10.1016/j.eururo.2009.07.018|issue=4|last2=Kerkhof|first2=Melissa|last3=Schröder|first3=Fritz H.|last4=Cuzick|first4=Jack|last5=Sasieni|first5=Peter|last6=Hakama|first6=Matti|last7=Stenman|first7=Ulf Hakan|last8=Ciatto|first8=Stefano|last9=Nelen|first9=Vera | displayauthors=8 }}</ref> One recent analysis of the ERSPC data suggested that projecting over a 25-year time horizon, which is more appropriate for a man in his 50s than the 9 years reported to date from the trial, the number needed to screen falls to 186-220, and the number needed to treat to prevent a death falls to between ''2 and 5 men''.<ref>{{cite journal|last=Gulati|first=R|title=Long-term projections of the harm-benefit trade-off in prostate cancer screening are more favorable than previous short-term estimates|journal=J Clin Epidemiol|year=2011|volume=64|pages=1412–17|pmid=22032753|doi=10.1016/j.jclinepi.2011.06.011|issue=12|last2=Mariotto|first2=Angela B.|last3=Chen|first3=Shu|last4=Gore|first4=John L.|last5=Etzioni|first5=Ruth|display-authors=etal}}</ref>


One commentator observed in 2011: “t is prudent only to use a single PSA determination as a baseline, with biopsy and cancer treatment reserved for those with significant PSA changes over time, or for those with clinical manifestations mandating immediate therapy..... absolute levels of PSA are rarely meaningful; it is the relative change in PSA levels over time that provides insight, but not definitive proof of a cancerous condition necessitating therapy.“<ref>{{cite journal |vauthors=Haythorn MR, Ablin RJ |title=Prostate-specific antigen testing across the spectrum of prostate cancer |journal=] |volume=5 |issue=4 |pages=515–26 |date=August 2011 |pmid=21861672 |doi=10.2217/bmm.11.53}}</ref>
In addition to the 20 percent reduction in prostate cancer mortality shown by the ERSPC study, a more recent study has shown greater effectiveness in how screening has reduced the prostate cancer death rate. A study published in the ''European Journal of Cancer'' (October 2009) documented that prostate cancer screening reduced prostate cancer mortality by 37 percent. By utilizing a control group of men from Northern Ireland, where PSA screening is infrequent, the research showed this substantial reduction in prostate cancer deaths when compared to men who were PSA tested as part of the ERSPC study.<ref name="Prostatecancer">{{cite journal | author = Van Leeuwen P.J. | year = 2009 | title = Prostate cancer mortality in screen and clinically detected prostate cancer: Estimating the screening benefit | url = | journal = European Journal of Cancer | volume = | issue = | page = |display-authors=etal}}</ref>


Men report low levels of distress surrounding PSA screening.<ref name=":1">{{Cite journal |last1=Chad-Friedman |first1=Emma |last2=Coleman |first2=Sarah |last3=Traeger |first3=Lara N. |last4=Pirl |first4=William F. |last5=Goldman |first5=Roberta |last6=Atlas |first6=Steven J. |last7=Park |first7=Elyse R. |date=2017-10-15 |title=Psychological distress associated with cancer screening: A systematic review |journal=Cancer |language=en |volume=123 |issue=20 |pages=3882–3894 |doi=10.1002/cncr.30904 |pmid=28833054 |issn=0008-543X|pmc=8116666 }}</ref> Men who present for PSA or have PSA levels at baseline scored low on cancer distress on numerous scales.<ref name=":1" />
The results from two of the largest randomized trials have now been published.<ref>{{cite news| url=https://www.nytimes.com/2009/03/19/health/19cancer.html?em | work=The New York Times | title=Prostate Test Found to Save Few Lives | first=Gina | last=Kolata | date=March 19, 2009 | accessdate=May 22, 2010}}</ref>


==History==
A US study, the Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial,<ref name="Andriole 1310"/> looked at the general effectiveness of a screening program involving both PSA and DRE methods. This was conducted between 1993 thu 2001, in which 76,693 men at 10 U.S. study centers 38,343 subjects received screening (an annual PSA testing for 6 years and DRE for 4 years) and a control group of 38,350 subjects received 'usual care' with subjects and health care providers receiving the results and deciding on the type of follow-up evaluation. 'Usual care' means that some in this group would have received some screening, as some organizations have recommended. After 7 years of follow-up, the incidence of prostate cancer per 10,000 person-years was 116 (2,820 cancers) in the screening group and 95 (2,322 cancers) in the control group. The incidence of death attributed to prostate cancer per 10,000 person-years was 2.0 (50 deaths) in the screening group and 1.7 (44 deaths) in the control group (rate ratio, 1.13; 95% CI, 0.75 to 1.70). The data at 10 years were 67% complete and consistent with these overall findings. The researchers concluded that after 7 to 10 years of follow-up, the rate of death from prostate cancer was very low and did not differ significantly between the two study groups.<ref name="Andriole 1310">{{cite journal | last = Andriole | first = Gerald L. | title = Mortality Results from a Randomized Prostate-Cancer Screening Trial | journal = NEJM | date = March 18, 2009 | url = http://content.nejm.org/cgi/content/full/NEJMoa0810696 | accessdate =2009-03-24 | pmid = 19297565 | pmc = 2944770 | doi = 10.1056/NEJMoa0810696 | volume = 360 | pages = 1310–9 | issue = 13 |display-authors=etal}}</ref>
]
Screening of PSA began in the 1990s. In the European Randomized Study of Screening for Prostate Cancer (ERSPC) initiated in the early 1990s, the researchers concluded that PSA-based screening did reduce the rate of death from prostate cancer but created a high risk of overdiagnosis, i.e., 1410 men would need to be screened and 48 additional cases of prostate cancer would need to be treated to prevent just one death from prostate cancer within 9 years.<ref name="Schröder, 1320">{{cite journal |vauthors=Schröder FH, Hugosson J, Roobol MJ, Tammela TL, Ciatto S, Nelen V, Kwiatkowski M, Lujan M, Lilja H, Zappa M, Denis LJ, Recker F, Berenguer A, Määttänen L, Bangma CH, Aus G, Villers A, Rebillard X, van der Kwast T, Blijenberg BG, Moss SM, de Koning HJ, Auvinen A |title=Screening and prostate-cancer mortality in a randomized European study |journal=The New England Journal of Medicine |volume=360 |issue=13 |pages=1320–8 |date=March 2009 |pmid=19297566 |doi=10.1056/NEJMoa0810084 |hdl=2027.42/137255 |s2cid=9602977 |hdl-access=free}}</ref>


A study published in the European Journal of Cancer (October 2009) documented that prostate cancer screening reduced prostate cancer mortality by 37 percent. By utilizing a control group of men from Northern Ireland, where PSA screening is infrequent, the research showed this substantial reduction in prostate cancer deaths when compared to men who were PSA tested as part of the ERSPC study.<ref name="Prostatecancer">{{cite journal | vauthors = van Leeuwen PJ, Connolly D, Gavin A, Roobol MJ, Black A, Bangma CH, Schröder FH | title = Prostate cancer mortality in screen and clinically detected prostate cancer: estimating the screening benefit | journal = European Journal of Cancer | volume = 46 | issue = 2 | pages = 377–83 | date = January 2010 | pmid = 19804966 | doi = 10.1016/j.ejca.2009.09.008 | s2cid = 207211780 | url = https://pure.qub.ac.uk/portal/en/publications/prostate-cancer-mortality-in-screen-and-clinically-detected-prostate-cancer-estimating-the-screening-benefit(ebd244f3-dc36-4b5a-b5d5-d1d66580bf58).html | access-date = 2019-02-02 | archive-url = https://web.archive.org/web/20150901041136/http://pure.qub.ac.uk/portal/en/publications/prostate-cancer-mortality-in-screen-and-clinically-detected-prostate-cancer-estimating-the-screening-benefit(ebd244f3-dc36-4b5a-b5d5-d1d66580bf58).html | archive-date = 2015-09-01 | url-status = dead }}</ref>
Commenting on the findings, the Chief Medical Officer of the American Cancer Society, Otis W. Brawley, MD, said
<blockquote>
"Many experts had anticipated these studies would show a small number of men will benefit from prostate screening, but a large number of men will be treated unnecessarily. And that's what these studies show. However, the question is not as simple as: 'does prostate cancer screening work?' What we need to know is: what are benefits of prostate cancer screening and are they large enough to outweigh the harms associated with it? And despite the release of this early data, we still cannot say whether the benefits outweigh the risk.<ref name="cancer.org">http://www.cancer.org/docroot/NWS/content/NWS_1_1x_Prostate_Cancer_Screening_Weigh_Risks_Benefits_With_Your_Doctor.asp</ref>"
</blockquote>


A study published in the ] in 2009 found that over a 7 to 10-year period, "screening did not reduce the death rate in men 55 and over."<ref name="Horan" /> Former screening proponents, including some from Stanford University, have come out against routine testing. In February 2010, the ] urged "more caution in using the test." And the ] concluded that "there was insufficient evidence to recommend routine screening."<ref name="Horan" />
His Deputy chief medical officer, Len Lichtenfeld, MD, MACP said


A further study, the ] Comparison Arm for ProtecT (CAP), as part of the Prostate testing for cancer and Treatment (ProtecT) study, randomized ] practices with 460,000 men aged 50–69 at centers in 9 cities in Britain from 2001–2005 to usual care or prostate cancer screening with PSA (biopsy if PSA ≥ 3).<ref name="ProtecT">{{cite web |author=ProtecT |date=July 25, 2007 |title=ProtecT Study (Prostate testing for cancer and Treatment) |publisher=] |url=http://www.epi.bris.ac.uk/protect |access-date=2007-11-19 |archive-url=https://web.archive.org/web/20071028005357/http://www.epi.bris.ac.uk/protect/ |archive-date=2007-10-28 |url-status=dead }}<br>
<blockquote>
{{cite journal |author=ISRCTN |date=March 6, 2006 |title=The CAP (Comparison Arm for ProtecT) study |website=isrctn.org |url=http://www.controlled-trials.com/ISRCTN92187251 |doi=10.1186/ISRCTN92187251 |doi-access=free }}<br>
"When one considers all of the problems associated with treatment for prostate cancer -- urine incontinence, impotence, pain and bleeding among others -- that is a lot of men left with a lot of symptoms to save one life."
{{cite journal |author=ISRCTN |date=November 19, 2007 |title=The ProtecT trial |website=isrctn.org |url=http://www.controlled-trials.com/ISRCTN20141297 |doi=10.1186/ISRCTN20141297 |doi-access=free }}</ref> The "Comparison Arm" has yet to report as of early 2018.<ref>{{cite web |url=http://www.bristol.ac.uk/population-health-sciences/projects/protect/about/ |title=Outline of the ProtecT study and its data and samples |publisher=Bristol Medical School: Population Health Sciences}}</ref>
</blockquote>


== See also ==
A further study, the ]'' Comparison Arm for ProtecT'' ''('''CAP''')'' and'' Prostate testing for cancer and Treatment'' ''('''ProtecT''')'' studies randomized ] practices with 460,000 men aged 50–69 at centers in 9 cities in Britain from 2001-2005 to usual care or prostate cancer screening with PSA (biopsy if PSA ≥ 3)<!--
* ]
-->,<ref name="ProtecT">{{cite web |author=ProtecT |date=July 25, 2007 |title=ProtecT Study (Prostate testing for cancer and Treatment) |publisher=] |url=http://www.epi.bris.ac.uk/protect }}<br>
* ]
{{cite web |author=ISRCTN |date=March 6, 2006 |title=The CAP (Comparison Arm for ProtecT) study |publisher=isrctn.org |url=http://www.controlled-trials.com/ISRCTN92187251}}<br>
* ]
{{cite web |author=ISRCTN |date=November 19, 2007 |title=The ProtecT trial |publisher=isrctn.org |url=http://www.controlled-trials.com/ISRCTN20141297}}</ref> has yet to report.


== References ==
==Alternative techniques==
{{Reflist}}
Given the high false-positive rate of the PSA test, research into the use of economically efficient novel biomarkers with greater sensitivity and specificity is ongoing. The goal is early identification of men harboring potentially fatal disease who should be referred for biopsy. Given that no single biomarker has yet been identified, combinations of biomarkers and clinical factors are being studied.
{{Male genital procedures}}

For example, The Stockholm 3 (STHLM3) study utilized a blood test to obtain plasma protein biomarkers (PSA, free PSA, intact PSA, hK2, MSMB, MIC1), and genetic polymorphisms (232 SNPs). These results were added to patient clinical factors (age, family history, previous negative prostate biopsy, prostate exam) and PSA concentration with the goal of increasing specificity without diminishing sensitivity to high-risk prostate cancer. The STHLM3 model performed significantly better than PSA alone in identifying cancers with a ] of at least 7 and is estimated to reduce the number of biopsies by 32% and avoid 44% of negative biopsies.<ref name="Gronberg">{{cite journal|last1=Grönberg|first1=Henrik|last2=Adolfsson|first2=Jan|last3=Aly|first3=Markus|last4=Nordström|first4=Tobias|last5=Wiklund|first5=Peter|last6=Brandberg|first6=Yvonne|last7=Thompson|first7=James|last8=Wiklund|first8=Fredrik|last9=Lindberg|first9=Johan|last10=Clements|first10=Mark|last11=Egevad|first11=Lars|last12=Eklund|first12=Martin|title=Prostate cancer screening in men aged 50–69 years (STHLM3): a prospective population-based diagnostic study|journal=The Lancet Oncology|date=December 2015|volume=16|issue=16|pages=1667–1676|doi=10.1016/S1470-2045(15)00361-7}}</ref>

The ] ] test, which is obtained from the first portion of a urine sample following a prostate massage and digital rectal exam, has been shown to correlate significantly higher with positive biopsies than PSA. With a PCA3 score cut-off of 35, sensitivity was 68%, specificity 71%, positive predictive value 67% and negative predictive value 71%. Overall accuracy was 69%. However, the score correlates better with tumor volume than tumor aggressiveness.<ref name="Guillem">{{cite journal|last1=Vlaeminck-Guillem|first1=V.|last2=Devonec|first2=M.|last3=Champetier|first3=D.|last4=Decaussi-Petrucci|first4=M.|last5=Paparel|first5=P.|last6=Perrin|first6=P.|last7=Ruffion|first7=A.|title=Test urinaire PCA3 et diagnostic du cancer prostatique : étude à partir de 1015 patients|journal=Progrès en Urologie|date=December 2015|volume=25|issue=16|pages=1160–1168|doi=10.1016/j.purol.2015.08.005}}</ref>

An alternative model to biomarkers utilizes pre-biopsy multiparametric ] (mpMRI) of the prostate with patients whose PSA is suspicious for cancer. The noninvasive mpMRI scan detects significant prostate cancer with up to 97% accuracy and allows the targeting of biopsy needles into the region of interest. This model potentially minimizes unnecessary prostate biopsies while maximizing biopsy yield.<ref>{{cite web|last1=Sperling|first1=D.|title=Multiparametric mri detection/diagnosis is superior to TRUS biopsy.|url=http://sperlingprostatecenter.com/multiparametric-mri-detectiondiagnosis-superior-trus-biopsy/|website=Sperling Prostate Center|accessdate=11 March 2016}}</ref> Despite concerns about the cost of MRI scans, compared to the long-term cost burden of the PSA/TRUS biopsy-based standard of care, the imaging model has been found to be cost-effective.<ref>{{cite journal|last1=de Rooij|first1=Maarten|last2=Crienen|first2=Simone|last3=Witjes|first3=J. Alfred|last4=Barentsz|first4=Jelle O.|last5=Rovers|first5=Maroeska M.|last6=Grutters|first6=Janneke P.C.|title=Cost-effectiveness of Magnetic Resonance (MR) Imaging and MR-guided Targeted Biopsy Versus Systematic Transrectal Ultrasound–Guided Biopsy in Diagnosing Prostate Cancer: A Modelling Study from a Health Care Perspective|journal=European Urology|date=September 2014|volume=66|issue=3|pages=430–436|doi=10.1016/j.eururo.2013.12.012}}</ref>

] (TRUS) has the advantage of being fast with minimal invasive and better than MRI for the evaluation of superficial tumor. It also gives details about the layers of the rectal wall, accurate and useful for staging primary rectal cancer. While MRI is better in visualization of locally advanced and stenosing cancers. For staging perirectal lymph nodes, both TRUS and MRI are capable. TRUS has small field of view, but 3D TRUS can improve the diagnosis of anorectal diseases.<ref>{{cite journal |title=Transrectal ultrasonography of anorectal diseases: advantages and disadvantages |author=Min Ju Kim |date=November 19, 2014 |pmc=4282231 |pmid=25492891 |doi=10.14366/usg.14051 |volume=34 |journal=Ultrasonography |pages=19–31}}</ref>

==References==
{{Reflist|30em}}


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Latest revision as of 15:13, 2 December 2024

Medical diagnostic method
Prostate cancer screening
PurposeDetect prostate cancer (when no symptoms are present)

Prostate cancer screening is the screening process used to detect undiagnosed prostate cancer in men without signs or symptoms. When abnormal prostate tissue or cancer is found early, it may be easier to treat and cure, but it is unclear if early detection reduces mortality rates.

Screening precedes a diagnosis and subsequent treatment. The digital rectal examination (DRE) is one screening tool, during which the prostate is manually assessed through the wall of the rectum. The second screening tool is the measurement of prostate-specific antigen (PSA) in the blood. The evidence remains insufficient to determine whether screening with PSA or DRE reduces mortality from prostate cancer. A 2013 Cochrane review concluded PSA screening results in "no statistically significant difference in prostate cancer-specific mortality...". The American studies were determined to have a high bias. European studies included in this review were of low bias and one reported "a significant reduction in prostate cancer-specific mortality." PSA screening with DRE was not assessed in this review. DRE was not assessed separately.

Most recent guidelines have recommended that the decision whether or not to screen should be based on shared decision-making, so that men are informed of the risks and benefits of screening. In 2012, the American Society of Clinical Oncology recommends screening be discouraged for those who are expected to live less than ten years, while for those with a longer life expectancy a decision should be made by the person in question. In general, they conclude that based on recent research, "it is uncertain whether the benefits associated with PSA testing for prostate cancer screening are worth the harms associated with screening and subsequent unnecessary treatment."

Prostate biopsies are used to diagnose prostate cancer but are not done on asymptomatic men and therefore are not used for screening. Infection after prostate biopsy occurs in about 1%, while death occurs as a result of biopsy in 0.2%. Prostate biopsy guided by magnetic resonance imaging has improved the diagnostic accuracy of the procedure.

Prostate-specific antigen

Prostate-specific antigen

Prostate-specific antigen (PSA) is secreted by the epithelial cells of the prostate gland and can be detected in a sample of blood. PSA is present in small quantities in the serum of men with healthy prostates, but is often elevated in the presence of prostate cancer or other prostate disorders. PSA is not a unique indicator of prostate cancer, but may also detect prostatitis or benign prostatic hyperplasia.

A 2018 United States Preventive Services Task Force (USPSTF) recommendation adjusted the prior opposition to PSA screening, suggesting shared decision-making regarding screening in healthy males 55 to 69 years of age. The recommendation for that age group states screening should only be done in those who wish it. In those 70 and over, screening remains not recommended.

Screening with PSA has been associated with a number of harms including over-diagnosis, increased prostate biopsy with associated harms, increased anxiety, and unneeded treatment. The evidence surrounding prostate cancer screening indicates that it may cause little to no difference in mortality.

On the other hand, up to 25% of men diagnosed in their 70s or even 80s die of prostate cancer, if they have high-grade (i.e., aggressive) prostate cancer. Conversely, some argue against PSA testing for men who are too young, because too many men would have to be screened to find one cancer, and too many men would have treatment for cancer that would not progress. Low-risk prostate cancer does not always require immediate treatment, but may be amenable to active surveillance. A PSA test cannot 'prove' the existence of prostate cancer by itself; varying levels of the antigen can be due to other causes.

Digital rectal examination

During a digital rectal examination (DRE), a healthcare provider slides a gloved finger into the rectum and presses on the prostate, to check its size and to detect any lumps on the accessible side. If the examination suggests anomalies, a PSA test is performed. If an elevated PSA level is found, a follow-up test is then performed.

A 2018 review recommended against primary care screening for prostate cancer with DRE due to the lack of evidence of the effectiveness of the practice.

The USPSTF recommends against digital rectal examination as a screening tool due to lack of evidence of benefits. Although DRE has long been used to diagnose prostate cancer, no controlled studies have shown a reduction in the morbidity or mortality of prostate cancer when detected by DRE at any age.

The American Urological Association in 2018 stated that for men aged 55 to 69, they could find no evidence to support the continued use of DRE as a first-line screening test; however, in men referred for an elevated PSA, DRE may be a useful secondary test.

A study by Krilaviciute et al. (2023) examined the effectiveness of the DRE as a standalone screening test for prostate cancer in >46,000 young men in Germany (age 45). It was found that DRE has a much lower detection rate for prostate cancer compared to PSA screening. Therefore, the authors recommend not to use DRE as a screening test for prostate cancer in young men, as it does not provide an improvement in detection compared to PSA screening.

Follow-up tests

Biopsy

Prostate biopsies are considered the gold standard in detecting prostate cancer. Infection after the biopsy procedure is a possible risk. MRI guided techniques have improved the diagnostic accuracy of the procedure. Biopsies can be done through the rectum or penis. The biopsy technique includes factors such as needle angle and prostate mapping method. People who have localized cancer and perineural invasion may benefit more from immediate treatment rather than adopting a watchful waiting approach.

Ultrasound

Transrectal ultrasonography (TRUS) has the advantage of being fast and minimally invasive, and better than MRI for the evaluation of superficial tumor. It also gives details about the layers of the rectal wall, accurate and useful for staging primary rectal cancer. While MRI is better in visualization of locally advanced and stenosing cancers, for staging perirectal lymph nodes, both TRUS and MRI are capable. TRUS has a small field of view, but 3D TRUS can improve the diagnosis of anorectal diseases.

Magnetic Resonance Imaging

MRI is used when screening suggests a malignancy. This model potentially minimizes unnecessary prostate biopsies while maximizing biopsy yield. Despite concerns about the cost of MRI scans, compared to the long-term cost burden of the PSA/TRUS biopsy-based standard of care, the imaging model has been found to be cost-effective. MRI imaging can be used for patients who have had a previous negative biopsy but their PSA continues to increase. Consensus has not been determined as to which of the MRI-targeted biopsy techniques is more useful. In a study involving 400 men aged 50 – 69, MRI screening identified more men with prostate cancer than PSA tests or ultrasound and did not increase the number of men who needed a biopsy. A large-scale trial of MRI screening, TRANSFORM, began in the UK in spring 2024.

Other imaging

Ga-PSMA PET/CT imaging has become, in a relatively short period of time, the gold standard for restaging recurrent prostate cancer in clinical centers in which this imaging modality is available. It is likely to become the standard imaging modality in the staging of intermediate-to-high risk primary prostate cancer. The potential to guide therapy, and to facilitate more accurate prostatic biopsy is being explored. In the theranostic paradigm, Ga-PSMA PET/CT imaging is critical for detecting prostate specific membrane antigen-avid disease which may then respond to targeted Lu-PSMA or Ac-PSMA therapies. For local recurrence, Ga-PSMA PET/MR or PET/CT in combination with mpMR is most appropriate. PSMA PET/CT may be potentially helpful for locating the cancer when combined with multiparametric MRI (mpMRI) for primary prostate care. Prostate multiparametric MR imaging (mpMRI) is helpful in evaluating recurrence of primary prostate cancer following treatment.

Other

A number of biomarkers (blood, urine and tissue based tests) for screening, diagnosing and determining the prognosis of prostate cancer are supported by evidence and used widely.

  • EpiSwitch® PSE is a blood test used for screening and diagnosing prostate cancer utilizing epigenetic markers to identify specific changes in regulatory looping structures (chromosome conformation signatures) associated with prostate cancer. Used in conjunction with a PSA test, the PSE test boosts accuracy from 55% to 94% offering a more effective and precise method for detecting and diagnosing prostate cancer.
  • The 4Kscore combines total, free and intact PSA together with human kallikrein 2. It is used to try to determine the risk of a Gleason score greater than 6.
  • The Prostate Health Index (PHI) is a PSA-based blood test for early prostate cancer screening. It may be used to determine when a biopsy is needed.
  • Prostate cancer antigen 3 (PCA3) is a urine test that detects the overexpression of the PCA3 gene, an indicator of prostate cancer.
  • ConfirmMDx is performed on tissue taken during a prostate biopsy. The test identifies men with clinically significant prostate cancer who would benefit from further testing and treatment. It can also help men without significant prostate cancer avoid unnecessary repeat biopsies.

Researchers at the Korea Institute of Science and Technology (KIST) developed a urinary multi marker sensor with the ability to measure trace amounts of biomarkers from naturally voided urine. The correlation of clinical state with the sensing signals form urinary multi markers was analyzed by two machine learning algorithms, random forest and neural network. Both algorithms provided a monotonic increase in screening performance as the number of biomarkers was increased. With the best combination of biomarkers, the algorithms were able to screen prostate cancer patients with more than 99% accuracy.

Guidelines

  • In 2012 the United States Preventive Services Task Force (USPSTF) recommended against prostate cancer screening using PSA. As of 2018 a draft for new recommendations suggests that screening be individualized for those between the ages of 55 to 69. It notes a small potential decrease in the risk of dying from prostate cancer, but harm from overtreatment. In those over the age of 70, PSA based screening is still recommended against.
  • The American Cancer Society "recommends that asymptomatic men who have at least a 10-year life expectancy have an opportunity to make an informed decision with their health care provider about screening for prostate cancer after they receive information about the uncertainties, risks, and potential benefits associated with prostate cancer screening. Prostate cancer screening should not occur without an informed decision-making process. Men at average risk should receive this information beginning at age 50 years. Men in higher risk groups should receive this information before age 50 years. Men should either receive this information directly from their health care providers or be referred to reliable and culturally appropriate sources."
  • Other guidelines and centers specializing in treating prostate cancer recommend obtaining a PSA in all men at age 45. This is based on emerging data indicating that an increased baseline PSA can be used to detect future significant disease.
  • The American Urological Association in 2018 states that men under the age of 55 and over the age of 69 should not be routinely screened. The greatest benefit of screening appears to be in men ages 55 to 69 years. To reduce the harms of screening, a routine screening interval of two years or more may be preferred over annual screening in those men who have participated in shared decision-making and decided on screening. Screening is done by PSA (blood test).
  • As of 2018, the UK National Health Service did not offer general PSA screening, for similar reasons to those given above. Individuals over the age of 50 who request it can normally obtain testing covered by the NHS.
  • The Canadian Urological Association in 2017 suggested screening be offered as a possibility to those who are expected to live more than 10 years, with the final decision based on shared decision making. They recommend a starting age for most people at 50, and age 45 among those at high risk. The Canadian Task Force on Preventive Health Care in 2014 strongly recommended against screening in those under 55 and over 70 years of age. They weakly recommended against screening among those 55–69.
  • Some men have germ-line mutations associated with prostate cancer development (e.g., BRCA1, BRCA2, HOXB13). Screening and its frequency is established after consulting with a geneticist.

Controversy

Screening for prostate cancer continues to generate debate among clinicians and broader lay audiences. Publications authored by governmental, non-governmental and medical organizations continue the debate and publish recommendations for screening. One in six men will be diagnosed with prostate cancer during their lifetime but screening may result in the overdiagnosis and overtreatment of prostate cancer. Though the death rates from prostate cancer continue to decline, 238,590 men were diagnosed with prostate cancer in the United States in 2013 while 29,720 died as a result. Death rates from prostate cancer have declined at a steady rate since 1992. Cancers of the prostate, lung and bronchus, and colorectum accounted for about 50% of all newly diagnosed cancers in American men in 2013, with prostate cancer constituting 28% of cases. Screening for prostate cancer varies by state and indicates differences in the use of screening for prostate cancer as well as variations between locales. Out of all cases of prostate cancer, African American men have an incidence of 62%. African American men are less likely to receive standard therapy for prostate cancer. This discrepancy may indicate that if they were to receive higher quality cancer treatment their survival rates would be similar to whites.

Prostate cancer is also extremely heterogeneous: most prostate cancers are indolent and would never progress to a clinically meaningful stage if left undiagnosed and untreated during a man's lifetime. On the other hand, a subset are potentially lethal, and screening can identify some of these within a window of opportunity for cure. Thus, PSA screening is advocated by some as a means of detecting high-risk, potentially lethal prostate cancer, with the understanding that lower-risk disease, if discovered, often does not need treatment and may be amenable to active surveillance.

Screening for prostate cancer is controversial because of cost and uncertain long-term benefits to patients. Horan echos that sentiment in his book. Private medical institutes, such as the Mayo Clinic, likewise acknowledge that "organizations vary in their recommendations about who should – and who shouldn't – get a PSA screening test." They conclude: "Ultimately, whether you should have a PSA test is something you'll have to decide after discussing it with your doctor, considering your risk factors and weighing your personal preferences."

A 2009 study in Europe resulted in only a small decline in death rates and concluded that 48 men would need to be treated to save one life. But of the 47 men who were treated, most would be unable to ever again function sexually and would require more frequent trips to the bathroom. Aggressive marketing of screening tests by drug companies has also generated controversy as has the advocacy of testing by the American Urological Association.

One commentator observed in 2011: “t is prudent only to use a single PSA determination as a baseline, with biopsy and cancer treatment reserved for those with significant PSA changes over time, or for those with clinical manifestations mandating immediate therapy..... absolute levels of PSA are rarely meaningful; it is the relative change in PSA levels over time that provides insight, but not definitive proof of a cancerous condition necessitating therapy.“

Men report low levels of distress surrounding PSA screening. Men who present for PSA or have PSA levels at baseline scored low on cancer distress on numerous scales.

History

Global comparisons of prostate cancer screening

Screening of PSA began in the 1990s. In the European Randomized Study of Screening for Prostate Cancer (ERSPC) initiated in the early 1990s, the researchers concluded that PSA-based screening did reduce the rate of death from prostate cancer but created a high risk of overdiagnosis, i.e., 1410 men would need to be screened and 48 additional cases of prostate cancer would need to be treated to prevent just one death from prostate cancer within 9 years.

A study published in the European Journal of Cancer (October 2009) documented that prostate cancer screening reduced prostate cancer mortality by 37 percent. By utilizing a control group of men from Northern Ireland, where PSA screening is infrequent, the research showed this substantial reduction in prostate cancer deaths when compared to men who were PSA tested as part of the ERSPC study.

A study published in the New England Journal of Medicine in 2009 found that over a 7 to 10-year period, "screening did not reduce the death rate in men 55 and over." Former screening proponents, including some from Stanford University, have come out against routine testing. In February 2010, the American Cancer Society urged "more caution in using the test." And the American College of Preventive Medicine concluded that "there was insufficient evidence to recommend routine screening."

A further study, the NHS Comparison Arm for ProtecT (CAP), as part of the Prostate testing for cancer and Treatment (ProtecT) study, randomized GP practices with 460,000 men aged 50–69 at centers in 9 cities in Britain from 2001–2005 to usual care or prostate cancer screening with PSA (biopsy if PSA ≥ 3). The "Comparison Arm" has yet to report as of early 2018.

See also

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