Carcinosarcoma of the prostate.

The present report describes a rare prostatic tumor occurring in a 78-year-old Japanese male. The histological features were those of carcinosarcoma involving an adenocarcinoma and a chondrosarcoma, with metastasis to the liver. The carcinomatous component stained positively for prostatic acid phosphatase (PAP) by an immunoperoxidase technique. The literature is reviewed.