Figure 10a. Enteroliths in a Meckel diverticulum in a 40-year-old man with chronic, intermittent abdominal pain. (a) Supine abdominal radiograph demonstrates multiple stones with peripheral calcification (arrow) in the right upper quadrant. (b) Image from a small bowel follow-through study shows a Meckel diverticulum in the right midabdomen (arrow). The dense collection of barium obscures the stones.