Bile Duct Intraductal Tubulopapillary Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A non-invasive epithelial neoplasm that arises from the bile ducts and is characterized by ductal differentiation, formation of tubular structures, presence of nodules and occasional papillary structures in dilated ducts, high grade dysplasia, and absence of significant mucin production.

**Synonyms:** - Bile Duct ITPN