Objective—To evaluate signalment, surgical treatment,
postoperative complications, and future breeding
success or semen production in a group of bulls
with naturally occurring disease of the scrotum or
Study design—Retrospective study.
Animals—21 bulls that underwent unilateral castration
after evaluation for scrotal swelling.
Procedure—A computer-assisted search of medical
records at 2 veterinary teaching hospitals was performed.
Historical, diagnostic, surgical, and follow-up
data were collected and analyzed for those bulls with
scrotal swelling that underwent unilateral castration.
Results—Four of 5 pasture breeding bulls and 9 of 10
semen collection-center bulls successfully bred cows
or produced viable semen within 6 months of surgery.
Fourteen of 21 surgical procedures were performed
after induction of general anesthesia. Sixty-six percent
of procedures were performed as open castrations.
Seventy-one percent of bulls developed postoperative
complications, most of which were mild swellings.
Unilateral castration returned 13 of 15 bulls with unilateral
disease of the scrotum or testis to productive
service by 6 months after surgery.
Conclusion and Clinical Relevance—Unilateral castration
is an effective treatment for unilateral disease
of the scrotum or testis in bulls, allowing return to
reproductive function. (J Am Vet Med Assoc 2002;