Pancreatic neuroendocrine neoplasms coexisting with biliary intraductal papillary mucinous neoplasm: A case report and review of literature

Figure 3 Pathological sections of the specimen. A: Pathological specimen showing pancreatic neuroendocrine carcinomas (small cell neuroendocrine carcinomas) on the left and intraductal papillary mucinous neoplasm of the bile duct on the right [Hematoxylin and eosin (HE) staining, 100 ×]; B: Immunohistochemical image of the pancreatic specimen showing positive neuroendocrine markers (synaptophysin, 100 ×); C: Pathological section of the bile duct specimen showing intraductal papillary mucinous neoplasm (HE staining, 100 ×); D: Immunohistochemical image of the bile duct specimen (Ki-67, 100 ×). The pathological sections underwent standard procedures of fixation, dehydration, embedding, sectioning, and HE staining. All sections were independently reviewed by two pathology specialists, and the conclusions were reached through a consensus assessment.