[A CASE OF MUCIN-PRODUCING UROTHELIAL-TYPE ADENOCARCINOMA OF THE PROSTATE (MPUAP) WITH LONG-TERM SURVIVAL AFTER TOTAL CYSTECTOMY].

Mucin-producing urothelial-type adenocarcinoma of the prostate (MPUAP) is a very rare disease. MPUAP has been reported to progress faster than the rate at which normal prostate cancer progresses. We report a case of MPUAP with long-term survival. The patient was a 65-year-old man. Computed tomography and magnetic resonance imaging showed a cystic lesion extending from the prostate to the urethra. We performed transrectal prostate biopsy and transurethral resection of the tumor, and the pathological diagnosis was adenocarcinoma. Subsequently, we performed total cystectomy, ureterostomy, and pelvic lymphadenectomy. Based on the pathological and immunostaining findings (prostate-specific antigen negativity, CDX-2 positivity, cytokeratin 20 positivity, 34β-E12 positivity), the patient was diagnosed with MPUAP. Four years after the surgery, recurrence or metastasis was not observed.