A dilated tortuous tributary vein to the hemiazygos vein seen first as an unusual inferior posterior mediastinal mass.
D001401:Azygos Vein; D006801:Humans; D008477:Mediastinal Diseases; D008479:Mediastinal Neoplasms; D008482:Mediastinum
AZYGOS VEIN; MEDIASTINAL NEOPLASMS