title: Resolution of Bile Duct Adenoma over Follow-up Period; A Case Report.
abstract: Bile duct adenoma (BDA) is a rare neoplasm of bile ducts with various clinical manifestations and imaging appearances. A few cases of BDA and their predisposing factors have been described. We report a 35-year-old woman with right upper quadrant pain who consumed oral contraceptive pills. Ultrasound study revealed three hypoechoic subcapsular liver masses; two of them were hypodense in computed tomography. Fine needle biopsy of the largest mass showed bile duct adenoma. Liver masses disappeared after discontinuing the pills over a 2-year follow-up. BDAs can manifest in imaging. Although previous studies have not reported tumor resolution over a follow-up period, we suggest paying more attention to predisposing factors in order to give an opportunity for tumor resolution by risk factor elimination.
authors.affiliation: Assistant Professor, Department of Internal Medicine, Gastroenterology and Hepatology, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mitra
authors.initials: M
authors.lastname: Ahadi
authors.affiliation: Professor, Department of Internal Medicine, Gastroenterology and Hepatology, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Khosravi Khorashad
authors.affiliation: Professor, Department of Internal Medicine, Gastroenterology and Hepatology, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Hassan
authors.initials: H
authors.lastname: Saadatnia
authors.affiliation: Professor, Department of Internal Medicine, Gastroenterology and Hepatology, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Hassan
authors.initials: H
authors.lastname: Vosoughinia
authors.affiliation: Assistant Professor, Department of Radiology, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Behrooz
authors.initials: B
authors.lastname: Davachi
authors.affiliation: Assistant Professor, Department of Internal Medicine, Gastroenterology and Hepatology, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mohammadreza
authors.initials: M
authors.lastname: Farzanehfar
authors.affiliation: Pathologist, Razavi Hospital, Mashhad, Iran.
authors.forename: Kamran
authors.initials: K
authors.lastname: Ghaffarzadehgan
authors.affiliation: Associate Professor, Department of Pathology, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Bahram
authors.initials: B
authors.lastname: Memar
authors.affiliation: Assistant Professor, Department of medical sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
authors.forename: Elham
authors.initials: E
authors.lastname: Mokhtari Amirmajdi
keywords: Bile duct adenoma; Follow up; Liver biopsy; Liver mass; Oral contraceptives