Inverted Meckel's diverticulum causing intussusception in a Crohn's patient.

Cases of inverted intraluminal Meckel's diverticulum (MD) containing a lipoma, pancreatic and gastric ectopic tissue resulting in intussusception are extremely rare. We have been unable to locate any such presentation in a Crohn's patient; here, we discuss one such case. MD is the most common congenital malformation of the human gastrointestinal tract. Its paediatric preponderance may result in its oversight in the adult population as a cause for symptoms. Intestinal obstruction is the most common adult presentation in non-inverted MD, whereas haemorrhage and anaemia are the most frequent presenting complaint with an 'inverted' MD. Adult intussusception due to an inverted MD is exceptionally rare with a poorly understood pathophysiology and life-threatening consequences. There is no gold standard diagnostic test for an inverted MD causing an intussusception, rather clinicians should utilize many modalities including angiography, ultrasound and computed tomography. Treatment of an inverted adult MD causing intussusception is surgical resection.