CD44 and dysplastic oral keratinocyte: The mean expression scores of CD44 were 268.4 ± 13.5, 240.8 ± 20.4, and 191.6 ± 18.3 in OSCC, oral epithelial dysplasia, and normal mucosa, respectively; CD44 staining too demonstrated a significant difference between the OSCC and normal oral mucosa (P < 0.001).