Bile Duct Intraductal Oncocytic Papillary Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A rare neoplasm that arises from the bile duct and is characterized by the presence of intraductal papillary growth and neoplastic epithelial cells with abundant eosinophilic granular cytoplasm.

**Synonyms:** - Bile Duct IOPN