The counts of CD3+, CD3+CD4+, CD3+CD8+, and CD16+CD56+ cells in CADM were significantly lower than those in CDM, and the levels of CEA, CA724, NSE, CYFRA21, and CA242 in CADM were significantly higher than those in CDM. The gene discussed is CD4; the disease is clinically amyopathic dermatomyositis.