Pulmonary Artery Aneurysm Causing Left Main Coronary Artery Disease

Pulmonary artery aneurysm is a rare clinical condition but may lead to serious complications such as pulmonary artery dissection, rupture and compression of left main coronary artery. The relation between the pulmonary artery and the adjacent structures should be considered after the diagnosis of the aneurysm. Surgery is suggested in the patients with increased diameter of the pulmonary artery or symptoms caused by the compression to the neighborhood tissues. In this case, we are reporting a 52-year-old female patient with pulmonary artery aneurysm causing the compression of left main coronary artery and presenting with chest pain. Owing to the successful surgical correction of the aneurysm, the compression of the left main coronary artery was removed. Relief of the coronary artery from the compression might be enough to improve symptoms in the patients with pulmonary artery aneurysm.