Solution: Meckel's diverticulum is a congenital outpouching in the distal small bowel and is the most common congenital abnormality of the GI tract. Rule of 2's is well known (2% of the population, 2 feet from the ileocecal valve, only 2% have clinical manifestations, symptoms usually manifest at 2 years of age (with the exception being diverticulitis, which can manifest at any age)). Findings described at CT include: mesenteric inflammatory changes, diverticulum communicating with small bowel, but often with an enterolith, or other cause of obstruction at time of presentation, location near midline, lack of opacification of the diverticulum with oral contrast, and mesenteric fluid. This case is "classic".