Pulmonary arterial aneurysm
The patient came complaining of chest pain and tightness and was referred from a cardiologist as he assumed that aortic aneurysm is suspected by echocardiography.
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On scout view: left hilar opacity not silhouetting the aorta or heart and make an obtuse angle with lung, suggestive of mediastinal origin.
On pulmonary angiogram:
- The left main pulmonary artery shows aneurysmal dilatation with no filling defect, in keeping with the pulmonary arterial aneurysm.
- Multiple filling defects are seen in the segmental arteries of a right lower lung lobe, in keeping with pulmonary embolism.
- The main pulmonary trunk and right main pulmonary arteries are normal in diameter.
- The aorta shows few calcified atheromas with no aneurysmal dilatation.
Pulmonary arterial aneurysms are a rare entity.