Ectopic pancreas is the most common congenital anomaly in the gastric
antrum. In some patients, there is a distinct tendency for this lesion
to produce intermittent crampy abdominal pain by provoking gastroduod
enal prolapse. This condition should be considered after a more distal
prolapse from intussusception is excluded. An upper gastrointestinal
series performed during an episode of symptoms may be diagnostic of th
is entity.