The main findings of the present study are (1) the expression of CD11b, CD11c, CD54, CD83, CD86, and MHC Class II molecules in CAD patients with CAE were higher than control subjects with CAD alone and normal coronary arteries; (2) there was a correlation between the levels of CD11c, MHC Class II, CD86, and the number of coronary vessels with CAE. Here, ITGAM is linked to coronary artery disorder.