A 4-year-old Thoroughbred gelding underwent an explorative celiotomy for a suspected small
intestinal obstruction. During surgery, an impacted diverticulum of the ileum was suspected,
necessitating a jejunocaecostomy. The owner opted for euthanasia. On post-mortem
examination and histopathology, a true diverticulum on the mesenteric side of the ileum, with
ileal hypertrophy, was diagnosed.