We compared the differences in serum levels of TMs including carcinoembryonic antigen (CEA), carbohydrate antigens (CA125, CA15-3, and CA19-9), squamous cell carcinoma antigen (SCC), cytokeratin-19-fragment (CYFRA21-1), neuron-specific enolase (NSE) and ferritin (FER), between SLE-ILD and SLE patients. The gene discussed is CEACAM5; the disease is interstitial lung disease.