title: Computed tomography appearance of idiopathic aneurysm of the azygos vein.
abstract: True idiopathic aneurysm of the azygos vein is a rarely described abnormality. The authors present a case of this anomaly in a 70-year-old woman with a history of rectal carcinoma. The aneurysm was found incidentally on computed tomography, performed to characterize the appearance of a lung nodule. The aneurysm decompressed when the patient was upright. The effects of respiratory and postural manoeuvres on the lesion are discussed and the computed tomography appearance is described.
authors.affiliation: Department of Medical Imaging, Sunnybrook Health Science Centre, North York, Ont.
authors.forename: M
authors.initials: M
authors.lastname: Mehta
authors.forename: M
authors.initials: M
authors.lastname: Towers
mesh_terms: D000230:Adenocarcinoma / Q000556:secondary / Q000601:surgery; D000368:Aged; D000783:Aneurysm / Q000000981:diagnostic imaging*; D001401:Azygos Vein / Q000000981:diagnostic imaging*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary; D012004:Rectal Neoplasms / Q000601:surgery; D003074:Solitary Pulmonary Nodule / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed