Main pulmonary artery obstruction

Tetralogy of Fallot (TOF) is a type of heart defect present at birth. Symptoms at birth may vary from none to severe. [Source: Wikipedia ]

May Be Caused by

 Common

Bronchogenic carcinoma

Histoplasmosis

Invasive thymoma

Lymphadenopathy

Lymphoma

Melanoma

Metastasis to lung

Pulmonary atresia

Pulmonary embolism

Pulmonic stenosis

Renal cell carcinoma metastasis to lung

Sarcoidosis

Tuberculosis

 Uncommon

Aortic aneurysm

Bernheim syndrome

Carcinoid syndrome

Cardiac neoplasm

Coarctation of pulmonary artery

Constrictive pericarditis

Endocardial fibroelastosis

Endomyocardial fibrosis

Idiopathic hypertrophic subaortic stenosis

Mediastinal fibrosis

Metastasis to heart

Neoplasm of pulmonary artery

Rheumatic heart disease

Sarcoma of heart

Sarcoma of pulmonary artery

Takayasu arteritis

Tetralogy of Fallot

VSD with infundibular pulmonary stenosis