Patent vitellointestinal duct with inverted ileal loop prolapse: A rare presentation

The vitellointestinal duct (VID) connects the yolksac to the midgut in the developing embryo and disappears by gestational week 9, just before the midgut returns to the abdomen. Failure of involution of the vitelline duct results in various residual structures like Meckel′s diverticulum, vitelline cord, enteric cyst, umbilical sinus, patent VID with ileal intussusception prolapsing over the umbilicus. The most common reported anomaly of residual vitelline duct is Meckel′s diverticulum with different presentations like bleeding, intestinal obstruction or diverticulitis. However, the patent VID with inverted ileal loop prolapse is a rarely reported. We have encountered three patients of this rare presentation who were managed successfully.