Metastatic renal cell carcinoma to the bladder 12 years after radical nephrectomy

We report, herein, a case of metastatic renal cell carcinoma of the urinary bladder. A 76‐year‐old man presented to our hospital. He had undergone right radical nephrectomy at 64 years of age. Cystoscopy revealed a solitary, spherical tumor 1.5 cm in size protruding into the urinary bladder. Transurethral resection was performed and the pathological diagnosis of the lesion was clear cell carcinoma. The patient is alive 12 months after recurrence to the bladder, under the administration of interleukin‐2.