Case report: gastroduodenal intussusception--an unusual cause of pancreatitis.

Gastroduodenal intussusception is a rare complication of polypoidal gastric tumours, and it has not previously been described as a cause of acute pancreatitis. We report a case of an endoscopically, radiologically and histologically proven intussuscepting gastric leiomyoma presenting with biochemical evidence of acute pancreatitis. The radiological appearance is illustrated and possible mechanisms for the pancreatitis are discussed.