In conclusion, this study shows that although mRNA expression levels of the immune system-related transmembrane receptors CD40, BAFFR, RANK and LTβR do not differ, protein levels of CD40 and BAFFR were lower in NSCLC while no change was observed in protein levels of RANK and LTβR. Here, TNFRSF13C is linked to non-small cell lung carcinoma.