膀胱肿瘤是泌尿系统最常见的肿瘤。作为膀脱肿瘤的生物学行为之一是易复发。临床上肿瘤的复发大多为非原位复发，认为实际是移行上皮的多发性肿瘤。也有作者认为是肿瘤细胞膀脱内种植所致。常用的手术配合化疗、放疗及免疫性治疗等方法对膀脱肿瘤的治疗及预防肿瘤复发取得了不 Bladder cancer is the most common type of cancer in the urinary system. One of the biological behaviors of bladder tumor is easy to relapse. Clinically, most of the recurrence of non-situ tumor recurrence, that the actual transitional epithelial multiple tumors. There are also the authors believe that tumor cells caused by bladder implantation. Commonly used surgery with chemotherapy, radiotherapy and immune therapy and other methods of treatment of bladder off tumor and prevention of tumor recurrence obtained