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The curious umbilicus: clue to the cause of abdominal pain.

Omphalomesenteric duct derivatives cause an assortment of complications, most notably intestinal hemorrhage and obstruction. Intestinal obstruction is the most lethal complication and usually results from a diverticulum with an attachment to the umbilicus. This cause of intestinal obstruction is not generally recognized preoperatively. We report a teenager with episodic abdominal pain, acute small bowel obstruction, and a curious umbilical deformity with an underlying omphalomesenteric duct remnant. We believe that this physical finding suggests the diagnosis in patients with intestinal obstruction who have experienced unexplained episodes of abdominal pain.