The second case had a history of left flank pain with hematuria for 10 years, and a left renal mass noted by intravenous urography (IVU) for 8 years.

• 第二个案例则为左侧腰痛合并血尿已有十年的病史，而且经由经静脉肾盂摄影发现左肾肿瘤已有八年。