Fig. 5
From: A resected case of recurrent ITPN in the remnant pancreas after pancreatoduodenectomy
Histopathological findings of the resected specimens in the second surgery. a, b The main tumor infiltrated into the main duct and the surrounding branch of the pancreatic duct. c–e Each tumor mass floated in the main pancreatic duct (arrow). No obvious malignant finding was observed in the pancreatic duct epithelium at each region