title: A rare cause of dilated bile duct incidentally detected on imaging.
abstract: Adenomas involving the extrahepatic bile ducts are rare benign tumours of the biliary tract. Given the asymptomatic nature of these tumours and the natural progression of biliary adenoma to carcinoma including cholangiocarcinoma, early detection is challenging. We present a case of an octogenarian woman with a remote history of gallstones who initially presented to the gastroenterology office for an incidental finding of biliary dilation, and whose subsequent imagings and biopsy suggested common bile adenoma. However, the patient was deemed a poor surgical candidate for pancreaticoduodenectomy, and unfortunately represented 5 months later with findings suggesting cholangiocarcinoma. This case provides a unique opportunity to study the natural progression of biliary adenoma to cholangiocarcinoma.
authors.affiliation: Department of Internal Medicine, Baystate Medical Center/Tufts University, Springfield, Massachusetts, USA.
authors.forename: Kah Poh
authors.initials: KP
authors.lastname: Loh
authors.affiliation: Department of Pathology, Baystate Medical Center/Tufts University, Springfield, Massachusetts, USA.
authors.forename: Deborah
authors.initials: D
authors.lastname: Nautsch
authors.affiliation: Department of Gastroenterology, Baystate Medical Center/Tufts University, Springfield, Massachusetts, USA.
authors.forename: David
authors.initials: D
authors.lastname: Desilets
authors.affiliation: Department of Gastroenterology, Baystate Medical Center/Tufts University, Springfield, Massachusetts, USA.
authors.forename: Vaibhav
authors.initials: V
authors.lastname: Mehendiratta
mesh_terms: D000236:Adenoma / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology; D000369:Aged, 80 and over; D001650:Bile Duct Neoplasms / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology; D018281:Cholangiocarcinoma / Q000000981:diagnostic imaging* / Q000473:pathology; D002760:Cholangiopancreatography, Endoscopic Retrograde; D003135:Common Bile Duct / Q000000981:diagnostic imaging* / Q000473:pathology; D004108:Dilatation, Pathologic / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology; D018450:Disease Progression; D005260:Female; D006801:Humans; D014463:Ultrasonography