[Neuroendocrine carcinoma of the prostate].

Small cell of undifferenciated tumors are present in almost all organs, and it impose the need of performing a differential diagnosis between undifferenciated tumors with residual differentiation according to the type of organ, and the carcinoma of small cells of neuroendocrine origin. The concept of neuroendocrine differentiation (NED) in the prostatic adenocarcinoma has reached considerable attention due to its prognostic and therapeutic implies. Here it is presented a new neuroendocrine prostatic carcinoma case taking care of its hystopathologic diagnosis and evolution.