title: Azygos vein aneurysm mimicking paratracheal mass: dynamic magnetic resonance imaging findings.
abstract: Aneurysms of the azygos vein are rare and can sometimes mimic a paratracheal or posterior mediastinal mass. It is important to confirm the diagnosis with radiologic tools before performing invasive procedures, which carry the risk of hemorrhage. Here, we present a case in a 79-year-old asymptomatic patient of an increasing azygos vein aneurysm that mimicked a growing paratracheal mass. Review of images obtained using various modalities, including dynamic magnetic resonance image (MRI), revealed that the image findings were suggestive of azygos vein aneurysm. Using this method, an exact diagnosis can be reached without resorting to invasive procedures.
authors.affiliation: Department of Radiology, Korea University Ansan Hospital, Ansan, Republic of Korea.
authors.forename: Ji Yung
authors.initials: JY
authors.lastname: Choo
authors.affiliation: Department of Radiology, Korea University Ansan Hospital, Ansan, Republic of Korea.
authors.forename: Ki Yeol
authors.initials: KY
authors.lastname: Lee
authors.affiliation: Department of Radiology, Korea University Ansan Hospital, Ansan, Republic of Korea.
authors.forename: Seon Jeong
authors.initials: SJ
authors.lastname: Oh
authors.affiliation: Department of Radiology, Korea University Ansan Hospital, Ansan, Republic of Korea.
authors.forename: Bo-Kyung
authors.initials: BK
authors.lastname: Je
authors.affiliation: Department of Radiology, Korea University Ansan Hospital, Ansan, Republic of Korea.
authors.forename: Seung Hwa
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Department of Radiology, Korea University Ansan Hospital, Ansan, Republic of Korea.
authors.forename: Baek Hyun
authors.initials: BH
authors.lastname: Kim
keywords: Azygos vein aneurysm; dynamic MRI; growing paratracheal mass