<unk>  heart defects may not show signs or symptoms until later stages of the child's life and have a delayed diagnosis.<unk><unk>  of the inferior<unk>  cava is asymptomatic in many patients. Adolescent males with the condition have shown to presents with symptoms such as spontaneous lower extremity DVT, leg swelling, leg pain, varices in the lower extremities, hepatic thrombosis and hematochezia. Chylothorax has been observed rarely as a symptom of<unk><unk>  of the superior<unk>  cava in infant patients. Chylothorax results as a rare complication in which chyle leaks into the thoracic space following direct incidental damage and can also lead to increased thoracic duct pressure. Chylothorax leakage commonly occurs in patients with additional complex<unk>  heart lesions, increasing the risk of underlying vascular anomalies. Other symptoms which may become present later than adolescence includes venous hypertension, post necrotic hepatic cirrhosis and portal hypertension from the manifestation of the condition.
Congenital stenosis of vena cava
Persistent left superior vena cava
Absent pulmonary valve syndrome
Aneurysm of sinus of Valsalva
Anomalous pulmonary venous connection
Interrupted aortic arch
Stenosis of pulmonary artery
Aberrant subclavian artery