title: The value of MRI in angiogram-negative intracranial haemorrhage.
abstract: In one year, cerebral angiograms were performed for intracranial haemorrhage (ICH) on 334 patients. No cause for haemorrhage could be identified in 41 (12%), 30 of whom had predominantly subarachnoid (SAH) and 11 predominantly parenchymal haemorrhage (PH). These patients were prospectively examined by cranial MRI 1-6 weeks after the ictus. The MRI studies were positive in 7 patients (17%). In the 30 patients examined after SAH, 2 studies were positive, showing an aneurysm in one case and a brain stem lesion of uncertain aetiology in the other. In those examined after PH, cavernous angiomas were shown in 2, a tumour in 1 and a vascular malformation in another; useful diagnostic information was thus obtained in 36% of this group.
authors.affiliation: Department of Neuroradiology, Radcliffe Infirmary, Oxford, UK.
authors.forename: S A
authors.initials: SA
authors.lastname: Renowden
authors.forename: A J
authors.initials: AJ
authors.lastname: Molyneux
authors.forename: P
authors.initials: P
authors.lastname: Anslow
authors.forename: J V
authors.initials: JV
authors.lastname: Byrne
mesh_terms: D000328:Adult; D000368:Aged; D017542:Aneurysm, Ruptured / Q000175:diagnosis; D001927:Brain Diseases / Q000175:diagnosis*; D001932:Brain Neoplasms / Q000175:diagnosis; D001933:Brain Stem / Q000473:pathology; D002533:Cerebral Angiography; D002543:Cerebral Hemorrhage / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006392:Hemangioma, Cavernous / Q000175:diagnosis; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis; D002538:Intracranial Arteriovenous Malformations / Q000175:diagnosis; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis*