Ruptured cerebral fusiform aneurysm with mucopolysaccharide deposits in the tunica media in a patient with Marfan syndrome.

Although aortic or cardiac complications are common in patients with Marfan syndrome, the presence of an intracranial aneurysm is comparatively rare. In this study, the authors report on their experience with resection of a ruptured fusiform aneurysm of the posterior cerebral artery in a 30-year-old woman with Marfan syndrome. Microscopic examination of the resected tissue showed many Alcian blue-staining deposits, consistent with the presence of mucopolysaccharide in the tunica media and focal fragmentation of the internal elastic lamina.