Figure 3.

Tissue microarray of BA. Immunohistochemical analysis of DAPK protein expression was conducted on a tissue microarray consisting of 66 BA and corresponding esophageal squamous mucosa specimens (original magnification, x1 and x20). Overview of the tissue microarray slide (A). DAPK-positive sample of non-neoplastic squamous mucosa (B). Examples of tissue microarray core with well-differentiated carcinoma and strong DAPK protein expression (C); moderately differentiated carcinoma and moderate protein expression (D); and poorly differentiated carcinoma with weak protein expression (E).