山西医科大学第一医院泌尿外科杨晓峰博士通过对山西、湖南等５所大医院１８００多例膀胱肿瘤病人的十年随访研究发现复发性膀胱肿瘤５０岁～６０岁发病率最高，血尿史平均１８．５个月，复发２～２４次，平均复发３．０９次；第一、二、三次无瘤期分别平均为３４．２个月、１ The first hospital of Shanxi Medical University Urology Dr. Yang Xiaofeng through Shanxi, Hunan and other five major hospitals in more than 1800 cases of bladder cancer patients, a 10-year follow-up study found that recurrent bladder cancer the highest incidence of 50 years old to 60 years old, an average of 18 years of history of hematuria. 5 months, relapse 2 ~ 24 times, with an average of 3.09 times; the first, second and third tumor-free period were 34.2 months on average, 1