[Acute urinary retention secondary to cavernous metastases from a prostatic tumor].

Prostatic carcinoma metastatic to the penis is a rare phenomenon. We report two cases of acute urinary retention due to penile metastases from a prostatic carcinoma. Patients may have a penile mass or diffuse swelling of the penis. Some patients develop priapism and urinary retention can be rarely observed. The most effective treatment seems to be local excision with wide resection and, if necessary, total penectomy. The prognosis remains poor regardless of the type of therapy employed.