Among patients with NSCLC and SCLC, the average test time during the study period was 2.53 and 4.04 for CEA, 2.12 and 3.61 for Cyfra21‐1, 2.12 and 3.96 for NSE, 1.50 and 2.56 for SCC, and 0.83 and 1.48 for ProGRP, respectively (Figure 2). The gene discussed is ENO2; the disease is small cell lung carcinoma.