Large atherosclerotic left main coronary aneurysm: a case report and review of literature.

Left main coronary aneurysm is a very rare disorder. Aneurysm may be single or multiple, saccular or fusiform. Atherosclerosis, mucocutaneous lymph node syndrome, trauma, angioplasty, atheroctomy, laser procedures, systemic lupus erythematosus, periarteritis nodosa or types of arteritis, dissection, syphilis, mycotic emboli may lead to coronary aneurysms. The main complications of coronary aneurysms are: thrombosis, distal embolisation, rupture and calcification. Operative therapy should be necessary for large left main coronary aneurysms because of their predisposition to thrombosis and embolism. The coexisting significant obstructive CAD may be important in making a decision for the operative treatment in patients with the left main coronary aneurysm. The proper type of operation is not clear.