Notably, the proportions of CD69+ (p = 0.0362; Figure 2A), NKG2D+ (p = 0.0045; Figure 2B) and HLA-DR+ γδ T cells (p = 0.0075; Figure 2C) were obviously elevated compared to the same phenotypes of local αβ T cells from OLP patients. Here, CD69 is linked to oral lichen planus.