The secondary tumor of the prostate derived from upper tract urothelial carcinoma: An autopsy case

INTRODUCTION: Metastatic urothelial carcinomas are common in lung, liver, and lymph nodes. We present rare secondary tumor of the prostate metastasized from upper tract urothelial carcinoma. CASE PRESENTATION: An 87‐year‐old man was diagnosed as urothelial carcinoma of left upper tract and bladder. Only transurethral resection of bladder tumor was performed as palliative therapy to control hematuria. Thereafter, the tumor of left upper tract showed aggressive progression with multiple metastases involving lymph nodes and bilateral lungs. Finally, autopsy revealed swelling of left kidney due to tumor growth and systemic cancer disseminations involving bilateral lungs and renal hilar lymph nodes. In addition, prostate tumor was found incidentally. Histological examination including immunohistochemistry revealed the prostate tumor as metastatic tumor from urothelial carcinoma of left renal pelvis. CONCLUSION: We reported rare secondary tumor of the prostate, derived from upper tract urothelial carcinoma. Further consideration would be required to provide better knowledge of the disease.