Figure 5c. Duodenal carcinoma in a 78-year-old woman with abdominal pain. (a) CT scan shows a mass (black arrowheads) with a central cavity containing air and blood (white arrowhead). The mass is difficult to differentiate from the pancreatic head (arrow). (b) MPR image reveals that the cavitating mass (black arrowheads) arises from the second portion of the duodenum (white arrowheads). Arrow indicates the pancreas. (c) VR image shows that the cavitating mass (arrowheads) arises from the second portion of the duodenum (long arrow) and is located inferior to the pancreas (short arrow).