Peripheral cerebral aneurysm associated with a glioma.

This 42-year-old man with acute subarachnoid, intraventricular and parenchymal hemorrhage from an angiographically and surgically confirmed successfully clipped, right splenial artery aneurysm, subsequently manifested a grade 3 astrocytoma at the site of the aneurysm. Intracranial aneurysms are recognized in association with metastases from cardiac myxoma and choriocarcinoma, but are rarely seen with primary brain tumors. In patients with nontraumatic peripheral aneurysms it would seem prudent to biopsy the aneurysm and/or surrounding necrotic tissue at the time of surgical clipping.