In contrast, PDCD4 mRNA expression in NSCLC tissues before and after radiotherapy (before, 0.96 ± 0.57; after, 1.47 ± 0.32) was lower than that in adjacent normal tissues (2.60 ± 1.59) (both P < 0.05). The gene discussed is PDCD4; the disease is non-small cell lung carcinoma.