Prostatic Ductal Adenocarcinoma with Papillary Features in a Bladder Washing: A Possible Pitfall in Urinary Cytology - Report of One Case.

In this article, we report on a case of combined, acinar and ductal prostatic adenocarcinoma affecting the prostatic urethra, which, due to a low degree of cytologic atypia and an exclusive papillary architecture with visible fibrovascular core, was erroneously diagnosed as a low-grade urothelial carcinoma based on its peculiar cytologic presentation in a bladder washing sample.