Rectal diverticulum in a terrier dog: A case report

Rectal diverticulum is a rare condition in dogs characterized by formation of a pouch orsac due to hernial protrusion of the mucous membranes through a defect in the muscularcoat of the rectum. A 12-year-old male terrier dog was admitted with a history of a leftperineal swelling, dyschezia and tenesmus during the last five months. Digital rectalexamination identified a weakness in the left pelvic diaphragm and feces-filled sac withinthe lateral wall of the rectum. Positive contrast radiography showed a marked solitarydiverticulum (3.5×4×4.5 cm) with wide-orifice neck arising from the left rectal wall.Using a lateral approach, a large rectal diverticulum was found and diverticulectomyfollowing standard herniorrhaphy was performed. The dog recovered uneventfully with nosigns of dyschezia during the next three years. Diverticulectomy by lateral approach andperineal herniorrhaphy produced excellent results.