title: [Perimesencephalic subarachnoid hemorrhage].
abstract: Acute, non-traumatic subarachnoid haemorrhage is usually caused by a ruptured aneurysm. This is a serious condition involving high mortality. Perimesencephalic haemorrhage has recently been identified as a clinical subset of subarachnoid haemorrhage. A pattern of haemorrhage predominantly limited to perimesencephalic cisterns on CT is highly predictive of a normal angiogram, and is connected with an excellent prognosis. We describe two patients with perimesencephalic haemorrhage.
authors.affiliation: Nevrologisk avdeling, Rikshospitalet, Oslo.
authors.forename: I A
authors.initials: IA
authors.lastname: Hynås
authors.forename: E
authors.initials: E
authors.lastname: Kerty
authors.forename: R
authors.initials: R
authors.lastname: Nyberg-Hansen
authors.forename: S J
authors.initials: SJ
authors.lastname: Bakke
mesh_terms: D000208:Acute Disease; D006801:Humans; D008297:Male; D008636:Mesencephalon / Q000000981:diagnostic imaging; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging* / Q000601:surgery; D014057:Tomography, X-Ray Computed