May Be Caused by

Aneurysmal venous dilatation

Anomalous umbilical vein

Aplasia cutis congenita

Asplenia syndrome

Blue rubber bleb nevus syndrome

Cruveilhier-Baumgarten syndrome

Cumming syndrome

Diverticulum of the superior vena cava

Familial total anomalous pulmonary venous connection

Hepatic fibrosis-renal cystic disease

Idiopathic dilatation of thoracic systemic veins

Obui-Himo syndrome

Polysplenia syndrome

Scimitar syndrome

Total anomalous pulmonary venous return

Turner syndrome

Venous aneurysm with cystic hygroma

Venous hemangiomatosis

Wiedemann-Rautenstrauch syndrome

Wrinkly skin syndrome