title: Migrating azygos vein and vanishing azygos lobe: MDCT findings.
abstract: OBJECTIVE
  The purpose of this study was to describe six cases of migrating azygos vein and to explain the etiologic factors that contribute to the migration. Six patients with migrating azygos vein were studied by MDCT before and after migration. Five patients had right pneumothorax. All patients had repeated episodes of cough, vomiting, and a short mesoazygos.
  
  
  CONCLUSIONS
  Pneumothorax, increased intrathoracic pressure, and a short mesoazygos, in combination or alone, are the main factors in azygos vein migration.
authors.affiliation: Department of Radiology, Clínica Universidad de Navarra, 36 Avenida Pío XII, 31008 Pamplona, Spain. avillanueva@unav.es
authors.forename: Alberto
authors.initials: A
authors.lastname: Villanueva
authors.forename: Jose
authors.initials: J
authors.lastname: Cáceres
authors.forename: Mónica
authors.initials: M
authors.lastname: Ferreira
authors.forename: Jordi
authors.initials: J
authors.lastname: Broncano
authors.forename: Esther
authors.initials: E
authors.lastname: Pallisa
authors.forename: Gorka
authors.initials: G
authors.lastname: Bastarrika
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001401:Azygos Vein / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011030:Pneumothorax / Q000000981:diagnostic imaging*; D011312:Pressure; D011446:Prospective Studies; D013902:Radiography, Thoracic; D015619:Respiratory System Abnormalities / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D012307:Risk Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*