TNF and non-small cell lung carcinoma: Therefore, we performed a case-only study with 225 NSCLC patients treated with chemoradiotherapy or radiotherapy alone to investigate whether these three SNPs (SNP -308 G>A and -1031 T>C in TNF-α, and +676 T>G) as well as the other two potentially functional SNPs (-1709A>T and +1663A>G in TNFRSF1B) are associated with overall survival of NSCLC.