Adenocarcinoma of the rectum seldom metastasizes or invades the penis by direct extension. A careful review of the literature has revealed only two similar cases. In 1933 Niewiesch1reported a case of adenocarcinoma of the rectum in a man aged 69. One and one-half years following resection of the rectum he returned because of priapism. No recurrence was found in the resected area, but the corpora cavernosa were rigid as the result of invasion by tumor tissue. Amputation of the penis was done, but the patient died ten months later from metastases. Matheson2in 1935 reported a case of adenocarcinoma of the rectum in a man, aged 72, with secondary carcinomatous deposits in the penis. The lesions were nodular and located on the dorsal surface of the penis. One month after his admission the deposits compressed the urethra, causing complete repression of urine. Necropsy and sections reviewed for