“…1,3) While the incidence of right coronary artery aneurysms was higher than that of left coronary artery aneurysms, the incidence of left main coronary artery aneurysms has been reported to be 0.1%, which is very rare. 4) The causes of coronary artery aneurysms are atherosclerotic, Kawasaki disease, connective tissue diseases such as Ehlers-Danlos or Marfan syndrome, arteritis such as systemic lupus erythematosus, Behçet disease or Takayasu arteritis, arterial infections, or trauma. Recently, PCI using drug-eluting stents has become one of causes of coronary artery aneurysms.…”