Similar to our results, Kumagai et al. (21) observed EGFR overexpression in all OLP samples, and additionally they observed overexpression of EGFR ligands (amphireguline, epireguline y HB-EGF [Heparin-binding-EGF like growth factor]) and decreased expression of the ligands EGF and TGF-alpha. The gene discussed is EGFR; the disease is oral lichen planus.