The insular ribbon sign ("loss of the insular ribbon") is a radiologic sign observed on computed tomography of the brain following acute middle cerebral artery strokes. This sign describes the loss of definition between gray and white matter in the brain along the lateral margins of the insular cortex. Loss of the insular ribbon occurs when edema forms in the cerebral tissue of the ischemic area following cerebrovascular occlusion, obscuring the gray-white interface.
References
- Truwit, C L; Barkovich, A J; Gean-Marton, A; Hibri, N; Norman, D (1990). "Loss of the insular ribbon: another early CT sign of acute middle cerebral artery infarction". Radiology. 176 (3): 801–806. doi:10.1148/radiology.176.3.2389039. ISSN 0033-8419. PMID 2389039.
- Chen, Jingshu; Li, Jinze; Xu, Zhihua; Zhang, Luojin; Qi, Shouliang; Yang, Benqiang; Chen, Zimeng; Wang, Xinrui; Duan, Yang (2022). "Prediction model of early biomarkers of massive cerebral infarction caused by anterior circulation occlusion: Establishment and evaluation". Frontiers in Neurology. 13. doi:10.3389/fneur.2022.903730. ISSN 1664-2295. PMC 9433650. PMID 36062018.
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