| Revision as of 15:16, 27 December 2024 editNetha Hussain (talk | contribs)Autopatrolled, Extended confirmed users11,860 edits +reflist | Latest revision as of 04:33, 28 December 2024 edit undoCitation bot (talk | contribs)Bots5,410,020 edits Altered journal. Add: doi-broken-date, pmc, pmid. Removed access-date with no URL. | Use this bot. Report bugs. | Suggested by BorgQueen | Linked from User:AlexNewArtBot/PhysicsSearchResult | #UCB_webform_linked 52/351 | ||
| (4 intermediate revisions by 3 users not shown) | |||
| Line 1: | Line 1: | ||
| {{Short description|Radiologic sign in knee injury}} | |||
| The double posterior cruciate ligament sign (double PCL sign) is a radiological finding seen on magnetic resonance imaging of the knee, specifically in the context of a ] of the medial meniscus. It refers to the appearance of a duplicated posterior cruciate ligament, where the displaced fragment of the torn medial meniscus lies parallel and inferior to the PCL, mimicking a second ligament.<ref>{{cite journal |last1=Venkatanarasimha |first1=Nanda |last2=Kamath |first2=A. |last3=Mukherjee |first3=K. |last4=Kamath |first4=S. |title=Potential pitfalls of a double PCL sign |journal=Skeletal Radiology |date=1 August 2009 |volume=38 |issue=8 |pages=735–739 |doi=10.1007/s00256-009-0654-5 |url=https://link.springer.com/article/10.1007/s00256-009-0654-5 |access-date=27 December 2024 |language=en |issn=1432-2161}}</ref> The double PCL sign has high specificity for meniscal tears when noted on MRI.<ref>{{cite journal |last1=Hadidi |first1=O |last2=Ellanti |first2=P |last3=Lincoln |first3=M |last4=Hogan |first4=N |title=Double PCL sign on sagittal MRI of the knee. |journal=BMJ |
The '''double posterior cruciate ligament sign''' (double PCL sign) is a radiological finding seen on magnetic resonance imaging of the knee, specifically in the context of a ] of the medial meniscus. It refers to the appearance of a duplicated posterior cruciate ligament, where the displaced fragment of the torn medial meniscus lies parallel and inferior to the PCL, mimicking a second ligament.<ref>{{cite journal |last1=Venkatanarasimha |first1=Nanda |last2=Kamath |first2=A. |last3=Mukherjee |first3=K. |last4=Kamath |first4=S. |title=Potential pitfalls of a double PCL sign |journal=Skeletal Radiology |date=1 August 2009 |volume=38 |issue=8 |pages=735–739 |doi=10.1007/s00256-009-0654-5 |pmid=19234702 |url=https://link.springer.com/article/10.1007/s00256-009-0654-5 |access-date=27 December 2024 |language=en |issn=1432-2161}}</ref> The double PCL sign has high specificity for meniscal tears when noted on MRI.<ref>{{cite journal |last1=Hadidi |first1=O |last2=Ellanti |first2=P |last3=Lincoln |first3=M |last4=Hogan |first4=N |title=Double PCL sign on sagittal MRI of the knee. |journal=BMJ Case Reports |date=10 October 2017 |volume=2017 |doi=10.1136/bcr-2017-222914 |pmid=29021146 |pmc=5652627 }}</ref><ref>{{cite web |title=The Radiology Assistant : Meniscus special cases |url=https://radiologyassistant.nl/musculoskeletal/knee/meniscus-special-cases |website=radiologyassistant.nl |access-date=27 December 2024}}</ref> | ||
| ==Pathophysiology== | ==Pathophysiology== | ||
| A bucket-handle tear is a specific type of longitudinal meniscal tear in which a fragment of the torn meniscus displaces toward the intercondylar notch of the knee. The displaced fragment often remains attached at its anterior and posterior horns but flips centrally into the notch.<ref>{{cite web |last1=Editor |first1=Data Trace |title=Bucket Handle Meniscus Tear |url=https://www.wheelessonline.com/joints/bucket-handle-meniscus-tear/ |website=Wheeless' Textbook of Orthopaedics |access-date=27 December 2024 |date=22 July 2020}}</ref> This displacement causes the torn meniscal fragment to align closely and parallel to the PCL, resulting in the appearance of a "double PCL" on sagittal MRI sequences. |
A bucket-handle tear is a specific type of longitudinal meniscal tear in which a fragment of the torn meniscus displaces toward the intercondylar notch of the knee. The displaced fragment often remains attached at its anterior and posterior horns but flips centrally into the notch.<ref>{{cite web |last1=Editor |first1=Data Trace |title=Bucket Handle Meniscus Tear |url=https://www.wheelessonline.com/joints/bucket-handle-meniscus-tear/ |website=Wheeless' Textbook of Orthopaedics |access-date=27 December 2024 |date=22 July 2020}}</ref> This displacement causes the torn meniscal fragment to align closely and parallel to the PCL, resulting in the appearance of a "double PCL" on sagittal MRI sequences. | ||
| ==Imaging characteristics== | ==Imaging characteristics== | ||
| The double PCL sign is best observed on sagittal T2-weighted or proton density-weighted MRI images.<ref>{{cite journal |last1=Vaishya |first1=R |last2=Vijay |first2=V |last3=Vaish |first3=A |last4=Agarwal |first4=AK |last5=Ghonge |first5=NP |title=Double Posterior Cruciate Ligament Sign on Magnetic Resonance Imaging: Imaging Variants, Mimics, and Clinical Implications. |journal=Journal of |
The double PCL sign is best observed on sagittal T2-weighted or proton density-weighted MRI images.<ref>{{cite journal |last1=Vaishya |first1=R |last2=Vijay |first2=V |last3=Vaish |first3=A |last4=Agarwal |first4=AK |last5=Ghonge |first5=NP |title=Double Posterior Cruciate Ligament Sign on Magnetic Resonance Imaging: Imaging Variants, Mimics, and Clinical Implications. |journal=Journal of Orthopaedic Case Reports |date=November 2017 |volume=7 |issue=6 |pages=76–79 |doi=10.13107/jocr.2250-0685.958 |doi-broken-date=28 December 2024 |pmid=29600217 |pmc=5868891 }}</ref> Key features include:<ref>{{cite journal |last1=Camacho |first1=Marc A. |title=The Double Posterior Cruciate Ligament Sign |journal=Radiology |date=November 2004 |volume=233 |issue=2 |pages=503–504 |doi=10.1148/radiol.2332020945 |pmid=15516620 |url=https://pubs.rsna.org/doi/abs/10.1148/radiol.2332020945?journalCode=radiology |access-date=27 December 2024 |issn=0033-8419}}</ref> | ||
| * Duplicated PCL Appearance: The native PCL appears as a curvilinear low-signal intensity structure in its typical anatomical location.The displaced meniscal fragment appears as a second parallel low-signal structure inferior to the PCL. | * Duplicated PCL Appearance: The native PCL appears as a curvilinear low-signal intensity structure in its typical anatomical location.The displaced meniscal fragment appears as a second parallel low-signal structure inferior to the PCL. | ||
| * Meniscal tear: Evidence of a longitudinal tear, often in the medial meniscus. | * Meniscal tear: Evidence of a longitudinal tear, often in the medial meniscus. | ||
| * Joint effusion: Joint effusion may be present, often associated with acute injury. | * Joint effusion: Joint effusion may be present, often associated with acute injury. | ||
| * Bone contusions: Sometimes seen in traumatic injuries causing bucket-handle tears. | * Bone contusions: Sometimes seen in traumatic injuries causing bucket-handle tears. | ||
| ==References== | ==References== | ||
| {{reflist}} | {{reflist}} | ||
| ] | |||
Latest revision as of 04:33, 28 December 2024
Radiologic sign in knee injuryThe double posterior cruciate ligament sign (double PCL sign) is a radiological finding seen on magnetic resonance imaging of the knee, specifically in the context of a bucket-handle tear of the medial meniscus. It refers to the appearance of a duplicated posterior cruciate ligament, where the displaced fragment of the torn medial meniscus lies parallel and inferior to the PCL, mimicking a second ligament. The double PCL sign has high specificity for meniscal tears when noted on MRI.
Pathophysiology
A bucket-handle tear is a specific type of longitudinal meniscal tear in which a fragment of the torn meniscus displaces toward the intercondylar notch of the knee. The displaced fragment often remains attached at its anterior and posterior horns but flips centrally into the notch. This displacement causes the torn meniscal fragment to align closely and parallel to the PCL, resulting in the appearance of a "double PCL" on sagittal MRI sequences.
Imaging characteristics
The double PCL sign is best observed on sagittal T2-weighted or proton density-weighted MRI images. Key features include:
- Duplicated PCL Appearance: The native PCL appears as a curvilinear low-signal intensity structure in its typical anatomical location.The displaced meniscal fragment appears as a second parallel low-signal structure inferior to the PCL.
- Meniscal tear: Evidence of a longitudinal tear, often in the medial meniscus.
- Joint effusion: Joint effusion may be present, often associated with acute injury.
- Bone contusions: Sometimes seen in traumatic injuries causing bucket-handle tears.
References
- Venkatanarasimha, Nanda; Kamath, A.; Mukherjee, K.; Kamath, S. (1 August 2009). "Potential pitfalls of a double PCL sign". Skeletal Radiology. 38 (8): 735–739. doi:10.1007/s00256-009-0654-5. ISSN 1432-2161. PMID 19234702. Retrieved 27 December 2024.
- Hadidi, O; Ellanti, P; Lincoln, M; Hogan, N (10 October 2017). "Double PCL sign on sagittal MRI of the knee". BMJ Case Reports. 2017. doi:10.1136/bcr-2017-222914. PMC 5652627. PMID 29021146.
- "The Radiology Assistant : Meniscus special cases". radiologyassistant.nl. Retrieved 27 December 2024.
- Editor, Data Trace (22 July 2020). "Bucket Handle Meniscus Tear". Wheeless' Textbook of Orthopaedics. Retrieved 27 December 2024.
{{cite web}}:|last1=has generic name (help) - Vaishya, R; Vijay, V; Vaish, A; Agarwal, AK; Ghonge, NP (November 2017). "Double Posterior Cruciate Ligament Sign on Magnetic Resonance Imaging: Imaging Variants, Mimics, and Clinical Implications". Journal of Orthopaedic Case Reports. 7 (6): 76–79. doi:10.13107/jocr.2250-0685.958 (inactive 28 December 2024). PMC 5868891. PMID 29600217.
{{cite journal}}: CS1 maint: DOI inactive as of December 2024 (link) - Camacho, Marc A. (November 2004). "The Double Posterior Cruciate Ligament Sign". Radiology. 233 (2): 503–504. doi:10.1148/radiol.2332020945. ISSN 0033-8419. PMID 15516620. Retrieved 27 December 2024.