Figure 3. Mucinous cystadenocarcinoma in a 75-year-old man. Oblique US image shows a mass in the pancreatic head (arrowheads) containing multiple small cysts. There was also a larger, 2 x 1.8-cm cyst (not shown). The common bile duct (arrow) is dilated due to obstruction by the mass. The gallbladder is also dilated and contains biliary sludge that forms a level.