Aneurysm of the left main coronary artery: progression of dilatation with concomitant deterioration of coronary stenoses.

A left main aneurysm is a rare angiographic finding. We describe a 59-year-old male with a large aneurysm in the left main coronary artery. The aneurysm had enlarged in comparison to its diameter of 3.5 years previously, together with a progression of severity of his coronary stenoses.