In non-CVID patients, there was an increase of Foxp3+, GATA3+, CD4+ and CD8+ T cell counts as well CD20+ B cell counts when the non-neoplastic mucosa distant from tumour was compared to gastric cancer (p = 0.001; p = 0.002; p = 0.006; p = 0.003; p = 0.004, respectively). Here, FOXP3 is linked to gastric cancer.