Repair of Pulmonary Artery Aneurysm with Mersilene Mesh: a Case Report

True pulmonary artery aneurysm secondary to disintegration of its walls is extremely rare and may be mistaken with lung tumor. Sometimes it may be discovered during thoracotomy.We present a 71- year old man with exertional dyspnea, cough and left sided chest wall pain who admitted to our hospital in April 1999. Conventional imaging suggested a left parahilar mass. Bronchoscopy was normal. Due to suspected lung malignancy, the patient became candidate for lobectomy.A huge pulmonary aneurysm was discovered at the time of thoracotomy. Since the patient could not tolerate pneumonectomy, a mersilene mesh was wrapped around the aneurysm and supported by it. He was followed up by obtaining chest x-ray, every 3 months in the first year and then every 6 months till now. There was no change in the size of the aneurysm and general condition of the patient is good.