title: [Rapid resolution of acute subdural hematoma. Report of two cases].
abstract: The authors report two cases of rapid resolution of acute subdural hematoma. Case 1, a 78-year-old male, sustained head trauma and became unconscious for a few minutes, but on arrival he was alert and neurological examination was normal. A computed tomography (CT) scan taken 5 hours after the injury showed a high-dense subdural hematoma partly containing low-density area over the right cerebral hemisphere. He was conservatively treated. A CT scan taken 33 hours after the injury disclosed diminution of the hematoma and appearance of a thin high-density layer in the subdural space adjacent to the tentorium. The high-density layer disappeared on a CT scan taken 7 days after the injury. Case 2, an 84-year-old female, struck her head in the occipital region. On arrival she was drowsy but otherwise had no neurological abnormality. A CT scan taken 1 hour after the injury demonstrated a high-dense subdural hematoma partly containing low-density area over the right cerebral hemisphere. She was conservatively managed and became asymptomatic. A CT scan taken 14 hours after the injury disclosed complete resolution of the hematoma and appearance of a thin high-density layer in the subdural space adjacent to the falx and the tentorium. This high-density layer also completely disappeared on a CT scan taken 14 days after the injury. It was suggested that a mechanism of rapid resolution of the acute subdural hematoma was attributable to washing-out by cerebrospinal fluid.
authors.affiliation: Department of Neurosurgery, Shin-Beppu Hospital, Oita.
authors.forename: S
authors.initials: S
authors.lastname: Fujioka
authors.forename: J
authors.initials: J
authors.lastname: Hamada
authors.forename: M
authors.initials: M
authors.lastname: Kaku
authors.forename: Y
authors.initials: Y
authors.lastname: Ushio
mesh_terms: D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006408:Hematoma, Subdural / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008297:Male; D012075:Remission, Spontaneous; D014057:Tomography, X-Ray Computed