title: Hemothorax with a high carbohydrate antigen 19-9 level caused by a bronchogenic cyst.
abstract: A 58-year-old man presented with right-sided chest pain. Radiography and computed tomography showed a pleural effusion in the right chest and a mass in the right hilum. Thoracentesis showed a hemothorax. The carbohydrate antigen (CA) 19-9 level in the pleural effusion was very high, requiring differentiation from malignancy. Positron emission tomography showed no significant fluorodeoxy glucose (FDG) accumulation. Magnetic resonance imaging revealed a cystic lesion. The tumor was resected for both a diagnosis and treatment. A pathological examination demonstrated a bronchogenic cyst. An immunohistochemical study suggested that the cyst was the source of the hemothorax and the high CA19-9 level.
authors.affiliation: Department of Pulmonary Medicine, Gifu Prefectural General Medical Center, Japan.
authors.forename: Akifumi
authors.initials: A
authors.lastname: Tsuzuku
authors.forename: Fumihiro
authors.initials: F
authors.lastname: Asano
authors.forename: Anri
authors.initials: A
authors.lastname: Murakami
authors.forename: Atsunori
authors.initials: A
authors.lastname: Masuda
authors.forename: Takuya
authors.initials: T
authors.lastname: Sobajima
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Matsuno
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Matsumoto
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Mori
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Takiya
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Iwata
mesh_terms: D001994:Bronchogenic Cyst / Q000150:complications* / Q000175:diagnosis; D018395:CA-19-9 Antigen / Q000276:immunology*; D002241:Carbohydrates / Q000276:immunology*; D003937:Diagnosis, Differential; D006491:Hemothorax / Q000175:diagnosis / Q000209:etiology* / Q000276:immunology; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D049268:Positron-Emission Tomography / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D018395:CA-19-9 Antigen; D002241:Carbohydrates