Cavernous hemangiomas of the dura mater at the convexity. Report of a case and therapeutical considerations.

A rare case of cavernous angioma of the dura mater at the convexity is presented. In comparison with the more common cavernous hemangiomas that arise from dural sinuses, the ones on the convexity have a much better prognosis. They do not seem to be associated with spontaneous hemorrhage, their removal is simpler and, transoperatory bleeding, if it occurs, is scanty. Computerized tomography detects the presence of cavernous angiomas of the convexity in only 70% of the cases, magnetic resonance imaging in 100%.