title: Benign prostatic epithelial polyp of the urethra.
abstract: Acquired polyps of the male urethra often present with hematuria and sometimes hemospermia. The histogenesis of these tumors has been debated. We report a case of a prostatic urethral polyp that proved to be of prostatic epithelial differentiation, as demonstrated by immunohistochemical identification of prostatic acid phosphatase and prostatic specific antigen within the tumor cells.
mesh_terms: D000135:Acid Phosphatase / Q000032:analysis; D000941:Antigens / Q000032:analysis; D004848:Epithelium / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D008875:Middle Aged; D011127:Polyps / Q000473:pathology*; D011467:Prostate / Q000201:enzymology / Q000276:immunology; D014523:Urethral Neoplasms / Q000473:pathology*
chemical_list: D000941:Antigens; D000135:Acid Phosphatase