Title: Neuroimaging Tip - Loss of the Insular Ribbon Sign<br/>Author: Wan-Tsu Wendy Chang<br/><a href='http://umem.org/profiles/faculty/1322/'>[Click to email author]</a><hr/><p> </p> <p> <span style="font-size:14px;">Neuroimaging Tip - Loss of the Insular Ribbon Sign</span></p> <ul> <li> <span style="font-size:14px;">Loss of the insular ribbon sign refers to loss of the gray-white differentiation of the insular cortex.</span></li> <li> <span style="font-size:14px;">This is an early sign of middle cerebral artery (MCA) stroke.</span></li> <li> <span style="font-size:14px;">The insular cortex has less collateral blood supply from the anterior cerebral artery (ACA) and posterior cerebral artery (PCA) than other portions of the MCA territory; thus making it more susceptible to ischemia.</span></li> </ul> <p> </p> <p> <span style="font-size:14px;"><img data-en-img-selected="true" src="cid:9a33fd76076a638e7fd169e61b561194" style="height: auto;font-family:'Helvetica Neue';font-size:14px;" /></span></p> <p> </p> <fieldset><legend>References</legend>
<ul style="font-family:'Helvetica Neue';font-size:14px;"> <li> Truwit CL, Barkovich AJ, Gean-Marton A, Hibri N, Norman D. Loss of the insular ribbon: another early CT sign of acute middle cerebral artery infarction. Radiology. 1990;176(3):801-6.</li> <li> Weekarkkody Y. “Loss of the insular ribbon sign” Radiopaedia.org. Accessed August 12, 2015. <a href="http://radiopaedia.org/articles/loss-of-the-insular-ribbon-sign">http://radiopaedia.org/articles/loss-of-the-insular-ribbon-sign</a></li> </ul> <div style="font-family:'Helvetica Neue';font-size:14px;"> </div> <div style="font-family: 'Helvetica Neue'; font-size: 14px; text-align: center;"> <em><strong>Follow me on Twitter @ EM_NCC</strong></em></div> </fieldset>