[Late relapse and urothelial carcinoma of residual ureter 16 years after radical nephrectomy: a case report].

A 66-year-old male was referred to our hospital for evaluation of tumors in his left residual ureter and the lung. He had a history of left nephrectomy due to "malignant renal tumor", performed by a general surgeon at another hospital 16 years ago. Since a definitive diagnosis of the kidney was uncertain, we speculated that the original renal disease was a renal pelvic cancer and had metastasized in the residual ureter and the lung. We performed systemic chemotherapy followed by resection of residual ureter with bladder cuff Pathological examination revealed urothelial carcinoma. However, the lung tumors did not respond to salvage chemotherapy and slowly progressed. Bronchoscopic biopsy was performed 2 years later and histological finding showed clear cell type renal cell carcinoma.