Prostatic type papillary tumor of the urethra with endocrine cells. Immunohistochemical study

A peculiar variety of prostatic neoplasm harbouring a constellation of endocrine cells is reported. The tumor had a papillary growth projecting into the lumen of the prostatic urethra. The histological appearances were somewhat unusual. One fragment showed a typical feature of a prostatic-type polyp. However, much of the tissue were covered by a dysplastic epithelium. Adenomatous transformation of prostate-type polyp or "endometrial" adenocarcinoma could be considered.