We report the finding of multiple cerebral aneurysms in a pair of iden
tical twins. One twin had subarachnoid hemorrhage and intracerebral he
matoma; her sister had subarachnoid hemorrhage and intraventricular bl
eeding. Angiography in both cases showed multiple cerebral aneurysms.
It is appropriate to recommend a cerebral angiographic examination of
an asymptomatic twin after the other twin has suffered an aneurysmal s
ubarachnoid hemorrhage.