Figure 1.

EGFR expression of SCC of the head and neck where (A) H&E and EGFR immunohistochemical staining showing the results of a typical tumor (left), normal squamous epithelium and skin adnexa (middle), and a superficial tumor (right). (B) Graph demonstrating the distribution of the immunohistochemical staining scores for tumor cells, stromal cells, normal epithelium, and TBS. EGFR: epidermal growth factor receptor, SCC: squamous cell carcinoma, H&E: hematoxylin & eosin, TBS: tumor-border score.