VGO 511: Veterinary Andrology and Reproductive Techniques (1+1)

TORSION OF TESTIS

• On a horizontal axis is observed most commonly in the stallion, especially trotting standardbreds.
• The affected testis is freely moveable within the scrotum.
• Often the tail of the epididymis is lateral instead of caudal.
• On assuming a fast trotting gait, pain is evident by abduction or “hiking” of the leg on the side of the affected testis.
• Some affected stallions appear unable to draw the testis out of the scrotum and into the inguinal canal.
• Suspensories are of limited value and unilateral or bilateral castration is indicated.
• Torsion of the retained abdominal or inguinal testis may rarely occur.
• This is usually accompanied by severe pain, swelling and congestion of the involved organ.
• Rotation or torsion of the testis is rarely reported in bulls.

It is reported most commonly in the dog and stallion and rarely in the pig.