Transient intussusception following single anastomosis duodeno-ileal (SADI) bypass surgery: case report and literature review

Intussusception is a rare but recognized complication following bariatric surgery, most commonly occurring after a Roux-en-Y gastric bypass. This report details a case of postoperative transient intussusception following a single anastomosis duodeno-ileal (SADI) bypass which has not previously been described. A 47-year-old male presented with intermittent colicky abdominal pain with a computed tomography demonstrating features consistent with intussusception several years after a SADI bypass. The patient underwent diagnostic laparoscopy which showed the intussusception had spontaneously resolved. Intussusception following bariatric surgery is uncommon, with proposed mechanisms, including altered bowel motility or loss of coordinated bowel peristalsis, loss of mesenteric fat after significant weight loss, and anastomotic staple lines acting as potential points of intussusception. Although exceedingly rare, intussusception should be considered in the differential diagnosis of post-SADI bypass patients presenting with episodic abdominal pain.