Non-invasive imaging in a rare case of main pulmonary artery aneurysm.

Report of an incidental chest X-ray finding of a large vessel dilation at the root of the ascending aorta in a 65-year-old female patient while pre-operative routine diagnostic. Due to prior allergic reaction to iodine contrast agent, non-invasive imaging was performed with magnetic resonance imaging (MRI), where the rare finding of a large aneurysm of the left pulmonary artery was diagnosed. Initial considerations of a surgical intervention were turned down as no clinical symptoms or risk factors were apparent.