Giant pulmonary artery aneurysm associated with mild congenital pulmonary stenosis

Pulmonary artery aneurysm is a rare condition. Poststenotic pulmonary artery dilatation and aneurysm may occur in congenital valvular pulmonary stenosis. We present an 11-year old girl referred to our clinic due to cardiac murmur detected by a physician during evaluation for back pain. We have noted mild congenital pulmonary stenosis and aneurysmatic dilatation of the main pulmonary artery (pulmonary artery diameter 5.6 cm) and performed pulmonary balloon valvuloplasty. Poststenotic aneurysmal dilatation secondary to congenital valvular pulmonary stenosis is a rare clinical entity. Balloon valvuloplasty is a safe and effective treatment method if there is no pulmonary hypertension or congenital heart disease with left-to-right shunt.