CTICasesPulmonary Artery Aneurysm
Imaging findings
Chest CT in an 80-year-old patient demonstrates a giant, 8 cm aneurysm of the main pulmonary artery. The right and left main branch pulmonary arteries are only mildly dilated. Associated findings include mild pulmonic valve stenosis and severe pulmonary valve regurgitation with right ventricular enlargement.
Key takeaways
Pulmonary artery aneurysms are rare vascular abnormalities that can be congenital or acquired. They are often associated with congenital heart disease (such as mild pulmonic stenosis) where high-velocity jets cause post-stenotic dilatation, exacerbated by volume overload from pulmonary regurgitation. While they carry a risk of rupture or dissection, conservative management is often chosen in elderly, minimally symptomatic patients.
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