What is it?

Aneurysm of Pulmonary Arteries (PAA) is a rare condition, infrequently diagnosed. An aneurysm is a focal dilatation of the three blood vessels layers. Pseudoaneurysms do not involve all layers of the arterial wall but possess a higher risk of rupture. PAA may be present at birth or acquired during childhood or adulthood. The main cause for PAA include atherosclerosis, inflammatory vasculitis such as Behchet syndrome, pulmonary hypertension, pulmonary artery catheterization, cystic medial necrosis, Marfan syndrome, trauma, tuberculosis, syphilis, and septic emboli.Mycotic aneurysms may occur with bacterial endocarditis or pneumonia.