Isolated congenital pulmonary incompetence
Pulmonary incompetence is common as an acquired lesion. It may follow pulmonary artery dilatation due to pulmonary hypertensio.q or be caused by damage to the valve cusps by surgery, bacterial endocarditis, rheumatic fever or syphilis. As an isolated congenital anomaly, however, it is extremely rare and may be the result of either idiopathic dilatation of the pulmonary artery or congenital abnormalities of the valve cusps. The case to be reported is considered to be another example of the isolated congenital lesion.