title: Granular cell tumor: unusual cause for mucocele of gallbladder.
abstract: A small granular cell tumor of the cystic bile duct is presented. A review of the literature revealed that all previously reported granular cell tumors in the biliary ducts affected women. Among them, 13 cystic bile duct tumors were exclusively small and slow-growing benign lesions. All had been operated on for gallstone disease, but in 10 cases no stone was actually found. Although such a small tumor might be easily overlooked grossly, histological diagnosis is relatively easy if differentiated from a reactive smooth muscle granular lesion.
mesh_terms: D000328:Adult; D001650:Bile Duct Neoplasms / Q000150:complications* / Q000473:pathology / Q000601:surgery; D002769:Cholelithiasis / Q000175:diagnosis; D003549:Cystic Duct; D003937:Diagnosis, Differential; D005260:Female; D005705:Gallbladder Diseases / Q000209:etiology*; D006801:Humans; D009078:Mucocele / Q000209:etiology*; D009379:Neoplasms, Muscle Tissue / Q000150:complications* / Q000473:pathology / Q000601:surgery