Increased expression of interleukin (IL)-5, -6, -10, -12, -17, interferon (IFN)-γ, and tumor necrosis factor (TNF)-α has been described in OLP lesions, and increased expression of IL-1, -6, -8, -18, and TNF-α has been described in the saliva of OLP patients [79]. Here, IFNG is linked to oral lichen planus.