label: Extrahepatic Bile Duct Small Cell Neuroendocrine Carcinoma
label_lc: extrahepatic bile duct small cell neuroendocrine carcinoma
description: "An aggressive, high-grade and poorly differentiated carcinoma with neuroendocrine differentiation that arises from the extrahepatic bile ducts.  It is characterized by the presence of malignant small cells."