We examined the relationship between expression of RBM5, EGFR, and KRAS in NSCLC and found that expression of RBM5 mRNA and protein was significantly negatively correlated with expression of EGFR and KRAS mRNA and protein in NSCLC tissues (p < 0.01; Tables 2 and 3). The gene discussed is KRAS; the disease is non-small cell lung carcinoma.