Impotence in bulls due to vascular shunts from the corpus cavernosum penis.

Eleven bulls were determined to be impotent due to vascular shunts from the corpus cavernosum penis to the extracorporeal circulation. Clinically, the bulls were unable to achieve erection when stimulated with an electroejaculator and in natural breeding trials. The vascular shunts were located by serial contrast radiography of the corpus cavernosum penis. Surgical correction of the shunts was attempted in 8 of the bulls by wedge resection of the tunica albuginea. In 4 bulls, the surgical correction was successful and the bulls were returned to service.