阵发性睡眠性血红蛋白尿是一种因红细胞异常所致慢性溶血性贫血.当溶血发作时,偶而可并发脑血栓形成,但出现脑血管性痴呆者尚未见报导.现将我们观察到的1例报导如下:患者男性,63岁,1979年10月25日因畏寒发热20余天,伴嗜睡、语言不清而入院.入院前8小时曾跌倒,但意识尚清,未发现酱油色尿. Paroxysmal nocturnal hemoglobinuria is a chronic hemolytic anemia caused by abnormal red blood cells.When hemolytic attack, occasionally complicated by cerebral thrombosis, but the occurrence of cerebrovascular dementia have not been reported.We now observe the 1 Cases reported as follows: Male patient, 63 years old, October 25, 1979 chills and fever for more than 20 days, with lethargy, ill-defined and admitted to hospital .8 hours before admission fell, but awareness is clear, no soy sauce color urine.