In the right side of the abdomen, there is high-density material pooling within a lumen which contains numerous small calcified bodies which are arachnid in morphology. This region appears to represent a duodenal diverticulum. Medial to this is a gas-filled structure containing solid material and additional calcified bodies measuring 3.7 cm. This is not continuous with bowel and is suspicious for a contained perforation. Marked surrounding fat stranding. No lymphadenopathy. No free intra-abdominal or pelvic fluid.