title: A 56-year-old man with a normal chest radiograph, elevated CA 19-9, and multiple hepatic lesions.
abstract: Carbohydrate antigen (CA 19-9) is a tumor marker associated with colorectal malignancies. Elevated CA 19-9 is seen in patients with benign and malignant disease of the lung. We present an unusual case of small cell lung cancer associated with elevated CA 19-9.
authors.affiliation: Division of Pulmonary Medicine and Critical Care Medicine, Bronx Lebanon Hospital Center, Bronx, NY 10457, USA.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Anwer
authors.forename: Gilda
authors.initials: G
authors.lastname: Diaz-Fuentes
authors.forename: Masooma
authors.initials: M
authors.lastname: Niazi
authors.forename: Sindhaghatta
authors.initials: S
authors.lastname: Venkatram