Fig. 3

AHR, CYP1A1, EGFR, and Ki-67 in a cSCC case. a Strong positive AHR immunoreactivity in both the nuclei and cytoplasm in SCC cells. b Weak CYP1A1 immunoreactivity with a cytoplasmic pattern in SCC cells. c Strong positive EGFR immunoreactivity in SCC cells. d Moderate Ki-67 immunoreactivity in SCC cells. (immunoperoxidase × 200)