RESUMO
Objective To investigate the significance of immunostainning for Ber EP4and EMA in the diagnosis of basal cell carcinoma and squamous cell carcinoma of the skin.Methods Immunohisto-chemical stainning for Ber EP4and EMA was performed on115cases of basal cell carcinoma,squamous cell carcinoma,Bowen' s disease,actinic keratosis,basosquamous cell carcinoma,seborrheic keratosis,and verruca vulgaris.Specimens were taken from neoplastic tissues as well as the surrounding skin and ap-pendages.Results Ber EP4was positively stained in all cases of basal cell carcinoma and basosquamous cell carcinoma,but negatively stained in squamous cell carcinoma,Bowen's disease,actinic keratosis,sebor-rheic keratosis and verruca vulgaris.Expression of EMA was found in most cases of squamous cell carcinoma and Bowen' s disease,and a few cases of actinic keratosis,and in none of basal cell carcinoma,basosqua-mous cell carcinoma,seborrheic keratosis and verruca vulgaris.Conclusions Routine immunohistochemical staining with both Ber EP4and EMA is helpful for distinction of skin basal cell carcinoma,squamous cell carcinoma,precancerosis and benign hyperplastic dermatoses.
