CD56⁺ and CD94⁺ NK cells coexpress ChemR23 in OLP. In OLP, CD56⁺, CD94⁺ NK cells (top series) and ChemR23⁺ cells (middle left) occur in the inflammatory infiltrate and within the epithelium. About 70% of CD56⁺ and CD94⁺ NK cells coexpress ChemR23 (middle right and bottom left; white arrowheads). A minor subset (about 40%) of CD56⁺ NK cells that infiltrate OLP lesions express the activation marker CD69 (bottom right, white arrowheads) Dot lines and asterisks indicate, respectively, stromal-epithelial interfaces and stromal papillae. Original magnification × 200 (for streptavidin-peroxidase staining) and × 400 (for immunofluorescence).