The combined application of examinations such as IVU, ultrasonography, retrograde pyelography, CT scanning, cystourethroscope, urine cytology etc before operation may improve the rate of correct diagnosis of pyelic carcinoma. 术前联合应用IVU、B超、逆行造影、CT、膀胱镜和尿脱落细胞学等检查可提高肾盂癌的正确诊断率。