title: Primary nonseminomatous germ cell tumor in the posterior mediastinum.
abstract: A 54-year-old man was admitted to our hospital for further examination following a chest radiographic screening test. He was asymptomatic but had an elevated serum concentration of alpha-fetoprotein. Chest computed tomography (CT) and magnetic resonance imaging showed a posterior mediastinal mass in the left thoracic paravertebral region. CT-guided percutaneous needle biopsy was performed, and the histological findings confirmed nonseminomatous germ cell tumor (NSGCT). Gonadal examination and F-18 fluorodeoxyglucose positron emission tomography findings indicated the posterior mediastinum as the origin of the disease. Reports of primary NSGCT in the posterior mediastinum are extremely rare.
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine Asahi Matsumoto, Japan.
authors.forename: Yousuke
authors.initials: Y
authors.lastname: Wada
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine Asahi Matsumoto, Japan.
authors.forename: Toshiki
authors.initials: T
authors.lastname: Yokoyama
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine Asahi Matsumoto, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamamoto
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine Asahi Matsumoto, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Hanaoka
authors.affiliation: Department of Radiology, Shinshu University School of Medicine Asahi Matsumoto, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kawakami
authors.affiliation: Department of Comprehensive Cancer Therapy, Shinshu University School of Medicine Asahi Matsumoto, Japan.
authors.forename: Tomonobu
authors.initials: T
authors.lastname: Koizumi
keywords: Alpha-fetoprotein; germ cell tumor; mediastinal tumor; neurogenic tumor