Fig. 6From: Histopathological specialized staining of oral lichen planus-induced fibrotic changes and surgical treatment of associated restricted mouth opening: a case reportImmunohistochemical staining results were negative for cytokeratin 13 (×100) (a), positive for cytokeratin 17 within the epithelium layer (×100) (b), and positive for Ki-67/MIB-1 primarily in the basal layer (×200) (c)Back to article page