title: [Three cases of non-traumatic acute subdural hematoma].
abstract: The authors present three cases of non-traumatic acute subdural hematoma showing interesting clinical features and operative findings. Case 1: A-50-year-old male was admitted because of sudden headache and epileptic seizure. Computed tomographic (CT) scan showed a right thin subdural hematoma, but cerebral angiography demonstrated no pathological findings, that might cause acute subdural hematoma on the follow-up CT scans. The hematoma changed to a chronic one within only 15 days, which was proved by the operation. Case 2: A 52-year-old male was hospitalized because of loss of consciousness. CT scan revealed a right subdural hematoma without subarachnoid hemorrhage and cerebral angiography demonstrated a right middle cerebral artery aneurysm. The hematoma was surgically proved to be due to rupture of the aneurysm. Case 3: A 52-year-old male was admitted because of headache, vomiting and left motor weakness. CT scan showed a thick right subdural hematoma and right carotid angiography revealed two internal carotid artery aneurysms. It was surgically certified that the subdural hematoma was caused by a tear in a cortical artery attached to the dura, not by the rupture of the aneurysms. Clinical cause and pathogenesis of so-called "non-traumatic" or "spontaneous" acute subdural hematomas were discussed, and the importance of emergency angiography for this condition is stressed.
authors.affiliation: Department of Neurosurgery, Chiba Emergency Medical Center.
authors.forename: T
authors.initials: T
authors.lastname: Serizawa
authors.forename: A
authors.initials: A
authors.lastname: Satoh
authors.forename: S
authors.initials: S
authors.lastname: Kobayashi
authors.forename: H
authors.initials: H
authors.lastname: Nakamura
authors.forename: M
authors.initials: M
authors.lastname: Odaki
authors.forename: A
authors.initials: A
authors.lastname: Miyata
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe
mesh_terms: D002339:Carotid Arteries / Q000000981:diagnostic imaging; D006408:Hematoma, Subdural / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed