title: Concurrent presentation of perimesencephalic subarachnoid hemorrhage and ischemic stroke.
abstract: Perimesencephalic subarachnoid hemorrhage (SAH) is a relatively benign form of SAH. The etiology of this condition is unknown but venous leakage has been believed to be the most likely cause. This report describes a patient with perimesencephalic SAH who presented with a concurrent acute pontine infarct demonstrated on diffusion-weighted magnetic resonance imaging. These findings suggest that in some instances perimesencephalic SAH is caused by rupture of a perforating artery.
authors.affiliation: Neurology and Neurological Sciences, Stanford University, Palo Alto, California 94304, USA. lansberg@stanford.edu
authors.forename: Maarten G
authors.initials: MG
authors.lastname: Lansberg
mesh_terms: D000368:Aged; D015901:Angiography, Digital Subtraction; D002545:Brain Ischemia / Q000150:complications* / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D002536:Cerebral Arteries / Q000473:pathology; D002544:Cerebral Infarction / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D006261:Headache / Q000209:etiology; D006801:Humans; D006973:Hypertension / Q000150:complications; D020299:Intracranial Hemorrhage, Hypertensive / Q000175:diagnosis; D008636:Mesencephalon / Q000098:blood supply* / Q000473:pathology; D019547:Neck Pain / Q000209:etiology; D011149:Pons / Q000098:blood supply*; D012422:Rupture, Spontaneous; D013345:Subarachnoid Hemorrhage / Q000150:complications* / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014839:Vomiting / Q000209:etiology