Torsion of the spermatic cord in a horse.

This research article discusses a case of a two-and-a-half-year-old Quarter Horse colt that was diagnosed with a 360-degree torsion of the left spermatic cord and the subsequent surgical treatment. It also highlights certain anatomical variations in the horse’s reproductive system which might have contributed to the condition.

Clinical Presentation

• The 2.5-year old Quarter Horse colt showed signs of abdominal discomfort. This was characterized by slight increases in heart and respiratory rates, suggesting the presence of pain or distress.
• The colt’s left scrotum was found to be moist and swollen (edematous), indicating fluid accumulation due to an underlying condition.
• The left testicle was larger than normal, hardened, and retracted slightly towards the abdominal cavity, revealing a possible testicular issue.
• The colt showed discomfort (resented) when its testicle was palpated, further indicating a testicular problem.
• Upon rectal palpation, swelling and pain were found in the left vaginal ring and the structures passing through it. These symptoms suggested an issue with the reproductive system or surrounding structures.

Surgical Intervention

• Emasculation, a surgical procedure to remove the male genitalia, was performed to correct the torsion of the spermatic cord – a serious condition that can result in testicular atrophy if left untreated.

Anatomical findings

• The tail of the epididymis and a portion of the body of the epididymis were found to be abnormally long, and were attached to the left testicle by an unusually long mesorchium, a fold of the peritoneum that suspends the testes within the scrotum.
• The ligaments supporting the epididymis and the testis (caudal ligament of the epididymis, and the proper ligament of the testis) were also elongated. Elongations of these structures can cause abnormal positioning of the testes and epididymis, leading to conditions like torsion.
• These anatomical anomalies may have predisposed the horse to suffering a torsion of the spermatic cord, a rotation that cuts off the blood supply to the testicle, causing severe pain and potential testicular damage.