van Gijn J, van Dongen K J, Vermeulen M, Hijdra A
Neurology. 1985 Apr;35(4):493-7. doi: 10.1212/wnl.35.4.493.
We studied 28 patients with subarachnoid hemorrhage and normal angiograms. On early CT (within 5 days) in 13 cases, blood was seen mainly or only in the cisterns around the midbrain. This pattern of hemorrhage was found in only 1 of 92 patients with a ruptured aneurysm. None of the unexplained perimesencephalic hemorrhages was associated with intracerebral hematoma or intraventricular hemorrhage. The clinical features also differed from those of aneurysmal hemorrhage; loss of consciousness was rare, and after 3 months, all 13 patients had returned to normal life. The cause of this benign disorder remains elusive, but a venous or capillary source seems likely.
我们研究了28例蛛网膜下腔出血且血管造影正常的患者。在早期CT（5天内）检查中，13例患者的血液主要或仅见于中脑周围的脑池。在92例动脉瘤破裂患者中，仅1例出现这种出血模式。所有原因不明的中脑周围出血均未伴有脑内血肿或脑室内出血。其临床特征也与动脉瘤性出血不同；意识丧失很少见，3个月后，所有13例患者均恢复了正常生活。这种良性疾病的病因仍不清楚，但似乎可能源于静脉或毛细血管。
