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Isolated acute nontraumatic cortical subarachnoid hemorrhage Cuvinciuc V; Viguier A; Calviere L; Raposo N; Larrue V; Cognard C; Bonneville FAJNR Am J Neuroradiol 2010[Sep]; 31 (8): 1355-62Our aim was to review the etiologic background of isolated acute nontraumatic cSAH. While SAH located in the basal cisterns originates from a ruptured aneurysm in approximately 85% of cases, a broad spectrum of vascular and even nonvascular pathologies can cause acute nontraumatic SAH along the convexity. Arteriovenous malformations or fistulas, cortical venous and/or dural sinus thrombosis, and distal and proximal arteriopathies (RCVS, vasculitides, mycotic aneurysms, Moyamoya, or severe atherosclerotic carotid disease) should be sought by noninvasive imaging methods or/and conventional angiography. Additionally, PRES may also be a source of acute cSAH. In elderly patients, cSAH might be attributed to CAA if numerous hemorrhages are demonstrated by GRE T2 images. Finally, cSAH is rarely observed in nonvascular disorders, such as abscess and primitive or secondary brain tumors.|Acute Disease[MESH]|Algorithms[MESH]|Brain Neoplasms/complications/diagnostic imaging[MESH]|Cerebrovascular Disorders/*complications/*diagnostic imaging[MESH]|Encephalitis/complications/diagnostic imaging[MESH]|Humans[MESH]|Radiography[MESH]|Subarachnoid Hemorrhage/*diagnostic imaging/*etiology[MESH] |
