膀胱内翻型乳头状瘤良性,好发于膀胱三角区,因易误诊为乳头状移行细胞癌,故认识其组织学特点是重要的。拟简要介绍两例,着重复习、讨论其病理诊断问题。临床资料例1 男、45岁。排尿困难5年,血尿2次77年2月2日入院。血尿鲜红有暗红血块,血块尿出后小便尚顺利。最近一次血尿始于元月30日,持续2天后自行消失。入院检查:双肾(一),膀胱区轻压痛, Bladder papilloma benign, occur in the trigone of the bladder, easily misdiagnosed as papillary transitional cell carcinoma, so to understand its histological features is important. Two cases are to be briefly introduced, focusing on reviewing and discussing the pathological diagnosis. Clinical data example 1 male, 45 years old. 5 years of dysuria, hematuria 2 times 77 years February 2 admission. Blood red blood has dark red blood clots, urination urine clot is smooth. The most recent hematuria started on January 30 and disappeared on its own for 2 days. Admission examination: kidneys (a), mild tenderness in the bladder area,