FIGURE 116.18 Juvenile polyp Double air-contrast barium enema shows a single polyp with long stalk in transverse colon (arrows ) Meckel Diverticulum Two percent of the population is born with a Meckel diverticulum This is the most common omphalomesenteric duct remnant The diverticulum is usually located 50 to 75 cm proximal to the terminal ileum Only 2% of persons with a Meckel diverticulum manifest any clinical problems The most common