Subdural hematomas due to ruptured cerebral aneurysms: angiographic diagnosis and potential pitfall for CT.

Two patients with subdural hematoma secondary to rupture of intracranial aneurysms are described. Computed tomography and plain skull films are generally the examination of choice for the patient with significant head trauma. In selected patients, however, cerebral angiography in place of, or along with, computed tomography may be necessary to demonstrate an underlying cause for the subdural hematoma.