This result was discordant with that of Al Omar et al. (2010), who did not observe any association of HLA-C C1 and C2 groups (encoding ligands for KIR2DL2/3 and KIR2DL1, respectively) with NSCLC, but found weak association of HLA-BBw4Thr80 (coding for a ligand for KIR3DL1) which lost significance after correction. This evidence concerns the gene KIR2DL1 and non-small cell lung carcinoma.