title: Elevated Carbohydrate Antigen 19-9 Level in a Patient with Horseshoe Type Pulmonary Sequestration.
abstract: Elevated carbohydrate antigen (CA) 19-9 can indicate malignancies of the gastrointestinal, pancreatic, and biliary tracts, and be found in a pulmonary sequestration. A 30-year-old man visited Seoul National University Bundang Hospital due to elevated CA 19-9 levels, representing pulmonary sequestration of the bilateral lower lobes, which were connected with each other. We performed left lower lobectomy and division of the systemic arteries. After operation, CA 19-9 levels decreased to normal range, even though a small amount of sequestrated lung remained in the right lower lobe. It is not uncommon that presence of pulmonary sequestration might elevate serum CA 19-9 levels; however, horseshoe type bilateral pulmonary sequestration is very rare.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Seoul National University Bundang Hospital.
authors.forename: Bub-Se
authors.initials: BS
authors.lastname: Na
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Seoul National University Bundang Hospital; Department of Thoracic and Cardiovascular Surgery, Inje University Sanggye Paik Hospital, Inje University College of Medicine.
authors.forename: Sungjoon
authors.initials: S
authors.lastname: Park
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Seoul National University Bundang Hospital; Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine.
authors.forename: Sukki
authors.initials: S
authors.lastname: Cho
keywords: Bronchopulmonary sequestration; Carbohydrate antigen 19-9; Horseshoe lung