TLR2 and cancer: The analysis of the obtained results, taking into account the stage of diagnosed gastric cancer, showed a statistically significant increase in the percentage of almost all tested populations of immune system cells expressing TLR2, with the exception of plasmacytoid dendritic cells BDCA2+CD123+, along with the increase in the cancer stage according to the TNM classification (Table 5) (Figure 1A–G).