Coronary artery aneurysms are rare, especially in the left main corona
ry artery. Coronary artery aneurysms may rupture or cause myocardial i
nfarction. There are only a few reports of coronary artery aneurysms o
f the left main coronary artery treated surgically. We report a case i
n which an arterial graft from the internal iliac (hypogastric) artery
was used for the reconstruction of a congenital coronary artery aneur
ysm of the left main coronary artery. After a follow-up of 5 years, th
e patient is well and in good condition.