Atherosclerotic Monstrous Double Aneurysm of the Left Main Coronary Artery: A Very Rare Angiographic Finding

Coronary artery aneurysm is a rare disease diagnosed in 0.3 to 4.9% of patients undergoing coronary angiography. The incidence of left main coronary artery aneurysm (LMCAA) is extremely rare: 0.1% [1]. Coronary artery aneurysm involves the right coronary artery, the left anterior descending and circumflex coronary arteries in descending order of frequency [2] and atherosclerosis is the most common cause. Other causes include arteritis, Kawasaki disease, angioplasty sequelae, laser procedures, traumatic injury, dissection, connective tissue disorders, Takayasu's arteritis, congenital (anomaly or genetic disorders such as Ehler-Danlos syndrome, Marfan syndrome) mycotic and idiopathic diseases.