Fig. 1

Photomicrographs of TLR-2 immunoexpression in the epithelium of the a control group showing cytoplasmic reaction in the basal and suprabasal cells (TLR-2 × 400), b non-smoker LP group showing cytoplasmic and nuclear reaction in the basal and prickle cells (TLR-2 × 200), c smoker LP group showing obvious diffuse cytoplasmic reaction in all layers of stratified squamous epithelium (TLR-2 × 200). (LP): Lichen planus