Retrograde jejunogastric intussusception

Retrograde intussusception pertains to the invagination of the intussusceptum in a direction opposite to normal peristalsis. Jejunogastric intussusception (JGI) is an infrequent complication linked to procedures such as gastrojejunostomy, Billroth II gastrectomy, and Roux-en-Y anastomosis. There are four types of JGI based on the type of intussuscepted bowel loop and two types based on clinical presentation. In its acute form, JGI presents as severe intestinal blockage, a mass in the left hypochondriac region, and the occurrence of hematemesis. In a chronic situation, it leads to the recurrent episodes of feeling full in the upper abdomen and experiencing vomiting because of intermittent and reversible intussusception. The gold standard investigation for diagnosis is a contrast-enhanced computed tomography (CECT) scan. Here, we describe a case of retrograde JGI in a patient who presented with the complaints of hematemesis. The CECT scan revealed the invagination of jejunal bowel loops into the stomach. This condition was treated surgically.