label: Extrahepatic Bile Duct Neuroendocrine Neoplasm
label_lc: extrahepatic bile duct neuroendocrine neoplasm
description: A neoplasm with neuroendocrine differentiation that arises from the extrahepatic bile ducts. It includes neuroendocrine tumors (well-differentiated neuroendocrine neoplasms) and neuroendocrine carcinomas (poorly differentiated neuroendocrine neoplasms).