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[Idiopathic pulmonary artery aneurysm in a patient presenting with chest pain].

Pulmonary artery aneurysm (PAA) is a rare entity, isolated or idiopathic PAA is even less common. A 62-year-old woman presented with complaints of chest pain on exertion, palpitation, and dyspnea. Her blood pressure was 100/60 mmHg, and radial pulse was 100 beats/min and rhythmic. Transthoracic echocardiography demonstrated extreme dilatation of the main pulmonary artery and its branches. Systolic pulmonary artery pressure measured over the tricuspid regurgitation was 30 mmHg. Transesophageal echocardiography confirmed the presence of dilated pulmonary arteries and there was no thrombus. By multislice computed tomography, the diameters of the main, left, and right pulmonary arteries were measured as 53 mm, 42 mm, and 34 mm, respectively. No cardiac or pulmonary cause was found for the PAA.