Fig. 2
a Computed tomography scan showing a diffuse and low-density 2.0 × 1.5 cm mass in the pancreatic head after 6.2 years from the initial surgery. The distal pancreatic duct was dilated, and there was evidence of associated pancreatitis. b Macroscopic photo of the resected specimens of the pancreatic head carcinoma. c Histologically, tumor consisted of well-differentiated ductal adenocarcinoma which resembles pathological appearances to the gallbladder carcinoma (bar indicates 100 µm). d Distinctive features of non-cancerous pancreatic parenchyma. Marked inflammatory reaction containing bile pigment within ductular lumens (arrow) in the proximal non-cancerous lesions (bar indicates 100 µm)