title: Case report: saccular aneurysm of the azygos vein simulating a paratracheal tumour.
abstract: We present a case of a large saccular aneurysm arising from the azygos arch in an asymptomatic 62-year-old man. Chest radiography showed a well-defined right paratracheal mass. Dynamic computed tomography revealed marked enhancement of the mass suggesting a vascular structure, but no flow void was demonstrated on magnetic resonance imaging, probably due to slow turbulent flow.
authors.affiliation: Department of Radiology, St Marianna University, Kanagawa, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kurihara
authors.forename: Y
authors.initials: Y
authors.lastname: Nakajima
authors.forename: T
authors.initials: T
authors.lastname: Ishikawa
mesh_terms: D000783:Aneurysm / Q000000981:diagnostic imaging* / Q000601:surgery; D001401:Azygos Vein / Q000000981:diagnostic imaging* / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging*; D008875:Middle Aged; D014057:Tomography, X-Ray Computed