CDKN2C mRNA expression levels well distinguished the SCLC samples from the non-SCLC samples, with a sensitivity, specificity, and AUC of ≥ 0.95 (Fig. 3J), demonstrating the conspicuous potential of CDKN2C expression levels to distinguish patients with SCLC from those without SCLC. This evidence concerns the gene CDKN2C and small cell lung carcinoma.