cases, pancreas Week 503: Case 3 April 26, 2023 pathadmin 1. Presented by Ralph Hruban, M.D. and prepared by Matthew Karafin, M.D.This lesion arose in the head of the pancreas and was associated with dilatation of the main pancreatic duct. Pancreatic intraepithelial neoplasia-3Intraductal papillary mucinous neoplasm with high-grade dysplasiaIntraductal papillary mucinous neoplasm with an associated invasive colloid carcinomaMucinous cystic neoplasm with high-grade dysplasia 1. Presented by Ralph Hruban, M.D. and prepared by Matthew Karafin, M.D.This lesion arose in the head of the pancreas and was associated with dilatation of the main pancreatic duct.