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Capillary Telangiectasias are small (0.3 to 1.0 cm) lesions composed of capillary vessels with saccular or fusiform dilations.

These tiny blood vessels lack muscular and elastic components in their walls. The vessels are separated from each other by normal appearing brain tissue without "gliosis" (scarring of the Brain). These lesions are rarely symptomatic and not likely to cause bleeding. Capillary Telangiectasias are almost always clinically silent.

Most Capillary Telangiectasias are found incidentally on autopsy. There are very few reports of concerning significant hemorrhage from these structures. There is some scientific speculation suggesting that Capillary Telangiectasias are pathophysiologically related to Cavernous Angiomas.


Capillary Telangiectasia can be identified as a tiny area of hypointensity on T2-weighted MRI scans although these hypodensities may represent previous subclinical hemorrhage.


No treatment is indicated.

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This page last edited on 2/22

All content ©2022 by Neurosurgical Consultants, P.A.
Author, Martin L. Lazar, MD, FACS
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