title: [Perimesencephalic subarachnoid hemorrhage--an independent clinical picture of non-aneurysmatic subarachnoid hemorrhage with a benign course].
abstract: Two hundred seventy-three Patients with acute SAH were treated within the last 46 months (1.4.1991 to 31.1.1995). Diagnosis was made upon visible SAH on CT-scans or bloody spinal tap regardless of a negative CT-scan. These patients harbored 194 aneurysms, 25 AVM and cavernomas. Within the same time-period we treated 27 Patients without SAH but harboring vascular malformations (17 aneurysms, 10 AVM and cavernomas). In 30 patients (11%) no bleeding source was detectable. Fourteen of these patients (5.1%) had blood concentrated within the perimesencephalic cisterns on the CT-scans. On admission all of these 14 patients (8 men, 6 female, aged 30 to 63 years) were awake and without mentionable neurological deficit, equalling Hunt & Hess grade 1 (11 patients) and 2 (3 patients). Neither the initial nor control angiography revealed a vascular malformation as a bleeding source. MRI-scans performed for 11 patients did not reveal further etiological clues. During a follow-up interval of 3 to 48 months, none of these patients suffered a rebleeding. Vasospasm was not or only slightly present, no ischemia leading to neurological deficit. GOS reached 5 and Karnofsky-scale was 100 for all of these patients. We conclude that the perimesencephalic SAH is a homogeneous entity with a different natural course than the common aneurysmatic SAH. Probably leakage within the capillary or venous circulation causes this form of SAH with a benign clinical course. Further experience is required to determine whether control angiography is mandatory in these patents with a distinct CT appearance.
authors.affiliation: Klinik für Neurochirurgie, Christian-Albrechts-Universität zu Kiel.
authors.forename: H
authors.initials: H
authors.lastname: Barth
authors.forename: A
authors.initials: A
authors.lastname: Nabavi
authors.forename: H
authors.initials: H
authors.lastname: Stein
authors.forename: A
authors.initials: A
authors.lastname: Behnke
authors.forename: H M
authors.initials: HM
authors.lastname: Mehdorn
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000150:complications / Q000175:diagnosis / Q000628:therapy; D002426:Cavernous Sinus / Q000473:pathology; D003937:Diagnosis, Differential; D003952:Diagnostic Imaging; D005260:Female; D005500:Follow-Up Studies; D006391:Hemangioma / Q000150:complications / Q000175:diagnosis / Q000628:therapy; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000175:diagnosis / Q000628:therapy; D002538:Intracranial Arteriovenous Malformations / Q000150:complications / Q000175:diagnosis / Q000628:therapy; D008297:Male; D008636:Mesencephalon / Q000473:pathology; D008875:Middle Aged; D009460:Neurologic Examination; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy
vernacular_title: Die perimesenzephale Subarachnoidalblutung--ein eigenständiges Krankheitsbild einer nichtaneurysmatischen Subarachnoidalblutung mit gutartigem Verlauf.