CD8A and oral lichen planus: Another study comparing the severity of atrophic/erosive lesions in OLP-HCV patients with idiopathic OLP patients showed that the OLP-HCV group exhibited a higher relationship between the counts of CD8/FOXP3+ T cells per mm2 (p = 0.018) and counts of CD8+ T cells per mm2 (p = 0.034) [19].