Figure 1: Immunoexpression PAKs 1/2 activated in actinic cheilitis and lip squamous cell carcinoma. Reaction of positivity seen in brown. (A) Negative control of the reaction, (B) stratified squamous epithelium adjacent to injury area, (C) actinic cheilitis, and lip squamous cell carcinoma: well-differentiated (D), moderately differentiated (E), and poorly differentiated (F) .