Figure 4. Abdominal complications. (a): Hyperbilirubinemia due to hilar mass (arrow) causing significant dilatation of intrahepatic biliary radicals which delays initiation of chemotherapy until relieved with percutaneous drainage; (b): right sided hydronephrosis (black asterisk) due to obstruction by the retroperitoneal mass (white asterisk); (c): L–asparaginase induced pancreatitis seen as necrosis in the pancreatic parenchyma with fluid collection (asterisk) and edema in the adjacent stomach wall (arrow); (d): axial CECT image in a patient with lymphoma with bowel thickening and aneurysmal dilatation of jejunal loop with focal defect in bowel wall (arrow) suggestive of perforation.