Non-aneurysmal perimesencephalic subarachnoid hemorrhage caused by a cavernous angioma.
BACKGROUND
Cavernous angiomas are responsible for intracranial hemorrhages, but bleeding is infrequently confined to the subarachnoid space.


METHODS
We describe an elderly, yet healthy man who sought medical attention for subarachnoid hemorrhage.


RESULTS
Vascular imaging failed to reveal a cerebral aneurysm, however magnetic resonance imaging done late in the course showed a cavernous angioma, on the surface of the left upper cerebellar peduncle, that had bled.


CONCLUSIONS
The so-called "angiography-negative" subarachnoid hemorrhage could have its source in small cavernous angiomas lying on the surface of basal skull brain structures.
Department of Neurology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
Shadi
S
Yaghi
Sowmini
S
Oomman
Salah G
SG
Keyrouz
D000368:Aged; D020786:Hemangioma, Cavernous, Central Nervous System / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology*; D014057:Tomography, X-Ray Computed