Gamuts

Dilated azygos vein

The azygos vein is a vein running up the right side of the thoracic vertebral column draining itself towards the superior vena cava. It connects the systems of superior vena cava and inferior vena cava and can provide an alternative path for blood to the right atrium when either of the venae cavae is blocked. [Source: Wikipedia ]

Synonyms
Azygos vein dilatation
May Cause
Abnormal azygoesophageal recess
Displacement of the thoracic paraspinal line
Enhancing mediastinal mass
Middle mediastinal lesion
Retrocardiac lesion
Wide superior mediastinum in an infant or child
May Be Caused by
 Common
Azygos continuation of inferior vena cava
Cardiac tamponade
Constrictive pericarditis
Expiration
Heart failure
Inferior vena cava obstruction
Overhydration
Pericardial effusion
Portal hypertension
Portal vein thrombosis
Pregnancy
Recumbency
Right heart failure
Splenic vein thrombosis
Superior vena cava syndrome
Tricuspid insufficiency
 Uncommon
Arteriovenous malformation of thoracic wall
Idiopathic
Mechanical obstruction of tricuspid valve
Pulmonary sequestration
Right atrial myxoma
Total anomalous pulmonary venous return
Traumatic arteriovenous fistula of azygos vein
Traumatic azygos vein pseudoaneurysm
Tricuspid stenosis

Copyright © 2022, Charles E. Kahn, Jr., MD, MS
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