Prostatic epithelial polyp of the prostatic urethra.

Ten cases of prostatic epithelial polyps of the prostatic urethra are reported. The ages of the patients were from 27 to 69 years, with a mean of 44 years. The most common clinical signs were gross hematuria, microhematuria, hematospermia, and dysuria. All specimens, obtained by transurethral resection, had a papillary or polypoid configuration. The tissue had a glandular structure that resembled that of the prostate. Prostate-specific antigen and prostatic acid phosphatase were found in the epithelial cells of the polyps by indirect immunoperoxidase staining. The polyps seemed to be hyperplasia of prostate-specific antigen and prostatic acid phosphatase-positive epithelial cells of the prostatic gland or duct, especially that of the latter.