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