Benign Extrahepatic Bile Duct Granular Cell Tumor

**Semantic type:** Neoplastic Process

**Definition:** A granular cell tumor that arises from the extrahepatic bile ducts and is characterized by the absence of atypical or malignant cytological and architectural features, and absence of invasive features or metastatic potential.

**Synonyms:** - Benign Extrahepatic Bile Duct Granular Cell Myoblastoma - Benign Granular Cell Myoblastoma of Extrahepatic Bile Duct - Benign Granular Cell Myoblastoma of the Extrahepatic Bile Duct - Benign Granular Cell Tumor of Extrahepatic Bile Ducts - Extrahepatic Bile Duct Benign Granular Cell Tumor