title: Straight sinus stenosis as a proposed cause of perimesencephalic non-aneurysmal haemorrhage.
abstract: Perimesencephalic nonaneurysmal haemorrhage (PMNH), a term first coined in 1985, is a diagnosis of exclusion. It is considered a benign form of subarachnoid haemorrhage with a good prognosis and a low risk of rebleeding. Its precise aetiology has not yet been determined. Haemorrhage of venous origin has been proposed as a cause, and has been demonstrated to be associated with venous abnormalities of the basal vein of Rosenthal. We present a patient with PMNH in whom an 80% stenosis at the union of the vein of Galen with the straight sinus is demonstrated. We thus propose hypertensive venous rupture secondary to venous sinus stenosis as an alternative cause for PMNH.
authors.affiliation: Department of Neurosurgery, Radcliffe Infirmary, Woodstock Road, Oxford, OX2 6HE, Oxford, UK.
authors.forename: Amjad
authors.initials: A
authors.lastname: Shad
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Rourke
authors.forename: Ali
authors.initials: A
authors.lastname: Hamidian Jahromi
authors.forename: Alexander L
authors.initials: AL
authors.lastname: Green
mesh_terms: D015984:Causality; D002550:Cerebral Veins / Q000000981:diagnostic imaging / Q000473:pathology*; D003251:Constriction, Pathologic / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology; D003392:Cranial Sinuses / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D020299:Intracranial Hemorrhage, Hypertensive / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008636:Mesencephalon / Q000000981:diagnostic imaging / Q000473:pathology*; D008875:Middle Aged; D010690:Phlebography; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D013346:Subarachnoid Space / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed