[Subarachnoid hemorrhage due to ruptured dissecting aneurysm of peripheral superior cerebellar artery].

The peripheral superior cerebellar artery (SCA) dissecting aneurysm (DA) is extremely rare, with only 4 cases (including our case) having been reported. Here we report a case of subarachnoid hemorrhage due to ruptured DA of peripheral SCA and summarize the 23 cases of the DA of peripheral arteries in the posterior fossa. A 64-year-old woman was found unconscious at home and was admitted to our hospital on December 12, 1998.

[A case of internal carotid-posterior communicating artery aneurysm presenting pure acute subdural hematoma].

The incidence of acute subdural hematoma (SDH) due to a ruptured intracranial aneurysm varies from 0.5% to 7.9% of all intracranial aneurysms.