1974～1984年,天津医学院第二附属医院对1702例可疑尿路肿瘤患者的4557例次尿标本,进行了脱落细胞吖啶橙染色荧光显微镜检查(AO-F)。279例膀胱癌的AO-F阳性率为86.7％,明显高于其他尿路肿瘤。膀胱癌病理组织学与AO-F的阳性率有关,移行细胞癌Ⅰ级为78.1％,Ⅱ级86.6％,Ⅲ级92.3％,非移行细胞癌为91.0％。AO-F的肯定假阳性率仅为 From 1974 to 1984, 4557 cases of urine samples from 1702 cases of suspected urinary tract tumors were screened by acridine orange staining (AO-F) in the Second Affiliated Hospital of Tianjin Medical University. 279 cases of bladder cancer AO-F positive rate was 86.7%, significantly higher than other urinary tract tumors. The histopathology of bladder cancer was related to the positive rate of AO-F. The grade Ⅰ of the transitional cell carcinoma was 78.1%, the grade Ⅱ 86.6%, the grade Ⅲ 92.3%, and the non-transitional cell carcinoma 91.0%. AO-F’s positive false positive rate is only