<prompt> What is the minimal internal diameter of giant coronary aneurysm in children with Kawasaki disease which pose highest risk for ruptures, thrombosis, stenosis and myocardial infarction?8 mm10 mm12 mm15 mm  <response>: -- Giant coronary aery aneurysms classic definition of 8 mm internal diameter pose the greatest risk for rupture, thrombosis or stenosis, and myocardial infarction 