In light of the information and observations of our research team presented in the introduction, the publication aimed to determine the expression level of selected TLR receptors (TLR2, TLR3, TLR4, TLR7, TLR8, and TLR9) in subpopulations of peripheral blood lymphocytes in patients diagnosed with NSCLC. Here, TLR2 is linked to non-small cell lung carcinoma.