Feline Intussusception Study Guide

Overview and Clinical Importance

Intussusception is the invagination or telescoping of one segment of the gastrointestinal tract into the lumen of an adjacent segment. The invaginated portion is called the intussusceptum, while the receiving segment is the intussuscipiens. This condition represents a surgical emergency in cats and is an important differential diagnosis for acute abdominal conditions on the NAVLE.

While intussusception is less common in cats than in dogs, it carries significant morbidity and mortality if not promptly diagnosed and treated. The condition most commonly affects young cats under one year of age, with approximately 80% of cases occurring in animals less than 12 months old. The ileo-colic junction is the most frequently affected site, though intussusception can occur anywhere along the gastrointestinal tract.

Etiology and Predisposing Factors

Intussusception occurs when increased motility (hyperperistalsis) of an intestinal segment drives it toward a relaxed following segment. The exact cause is often unclear, but several predisposing factors have been identified.