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- W1594940367 abstract "Background: The cause of spontaneous subarachnoid hemorrhage (SAH) is unknown in 15% of cases; idiopathic SAH has a better prognosis than aneurysmal SAH. When bleeding is confined to the perimesencephalic cisterns, SAH has an especially benign course. Methods: We retrospectively studied 108 patients admitted for spontaneous non-aneurysmal SAH between 1991 and 2004. We divided patients into two groups according to the bleeding pattern at cranial CT: perimesencephalic pattern (n = 60) and aneurysmal pattern (n = 48). We included only patients in whom no source of bleeding was detected at angiography; patients with aneurysmal pattern underwent at least two angiographic examinations. Mean follow-up was 5.5 years; follow-up consisted of telephone interview in 84.7% of patients. Results: All but one patient with perimesencephalic pattern were classified as grade I or II on the Hunt and Hess scale; the exception was the only patient in this group with a complication (hydrocephalus), who was classified as grade IV. Three-quarters of the patients with aneurysmal pattern were classified as grade I or II on the Hunt and Hess scale; 5 patients presented with hydrocephalus that required drainage and 2 with vasospasms without repercussions. No rebleeding or long-term complications were observed in either group. Conclusions: Non-aneurysmal SAH with a perimesencephalic pattern of bleeding has a benign course and excellent short-term and long-term prognosis. Patients with non-aneurysmal SAH with an aneurysmal pattern of bleeding have more complications, and the initial clinical situation has a significant impact on their prognosis." @default.
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- W1594940367 date "2011-10-04" @default.
- W1594940367 modified "2023-10-18" @default.
- W1594940367 title "Clinical outcome of spontaneous non‐aneurysmal subarachnoid hemorrhage in 108 patients" @default.
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- W1594940367 doi "https://doi.org/10.1111/j.1468-1331.2011.03542.x" @default.
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