[Acute subdural hematoma caused by rupture of a peripheral aneurysm of the sylvian artery].

A patient who suffered acute subdural hematoma secondary to rupture of intracranial aneurysm is reported. Cerebral angiography showed a subdural collection on the left hemisphere and a distal middle cerebral artery aneurysm. There was no history of head trauma, endocarditis or systemic infection, and physical examination was normal. Congenital etiology is presupposed. From our review of the literature this is a rare association. The author emphasizes on the continuing role of angiography to evaluate spontaneous subdural hematomas.