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Preoperative computed tomography (CT).
Inhomogeneous hypodense ill-defined focal lesion of the head of the pancreas (white arrows) with a dilated intra- and extrahepatic bile duct system due to a mass effect (black arrows) (A transverse image, porto-venous phase; B coronal image, porto-venous phase). Note the healthy adjacent parenchyma of the pancreas (white asterisks) and lack of signs of local irresectability.
