The most common locations in the gastrointestinal tract where an intussusception can take place are the junctions between freely moving segments and retroperitoneally or adhesionally fixed segments. Stimulation of the gastrointestinal tract by a food bolus produces an area of constriction above the bolus and relaxation below. Any intraluminal lesion in the gastrointestinal tract or irritant within the lumen, which alters the normal peristaltic pattern, is able to initiate intussusception. The duodenum, stomach, and esophagus are rarely involved in intussusception because they are less redundant and less mobile within the abdomen