Leiomyoma of the small colon in a horse.

This research article is about the discovery and treatment of a tumor, called a leiomyoma, in the small colon of a horse during an unrelated surgery.

Overview

This study details a case where a 4-year-old Thoroughbred horse gelding was found to have a type of tumor called a leiomyoma in its small colon. This was an incidental finding during a surgical procedure to correct a displacement in the horse’s large colon, an unrelated condition often referred to as colic in horses.

The Leiomyoma

• A leiomyoma is a kind of benign tumor that grows in smooth muscle cells, in this case, the cells of the horse’s small colon.
• This discovery was incidental as the horse underwent surgery for a different issue, highlighting the imperativeness of thorough examination during surgical procedures to discover and address such unexpected conditions.

Treatment

• Upon the discovery, both the tumor and 20 cm of the small colon were removed, a procedure referred to as resection.
• Following this resection, an end-to-end anastomosis, which is a surgical connection between two parts, was done. This helped to restore the horse’s colon function, connecting the remaining viable portions of the small colon directly to each other.

Postoperative Care and Complications

• Following the surgery, the horse experienced a fecal impaction proximal (near) to the anastomosis. This means that a blockage occurred in the area close to the site where the surgery was performed, possibly resulting from the changes in the digestive tract after the resection.
• The fecal impaction resolved after five days with administration of intravenous fluids, analgesics, and stool softeners, indicating a successful recovery from the surgery and a return to normal bowel function.

Significance of the Study

This study presents a rare and unique case of leiomyoma in a horse. The fact that the tumor was incidentally discovered during colic surgery underscores the importance of thorough examination in surgical procedures. The successful treatment and postoperative care of the horse also provides valuable insights into the management of such rare conditions in veterinary practice.