Figure 1From: Evaluation of gene amplification and protein expression of HER-2/neu in esophageal squamous cell carcinoma using Fluorescence in situ Hybridization (FISH) and immunohistochemistry Immunohistochemistry showing c-erbB-2 membrane staining in ESCC. (a) sample negative for expression of this protein, 400×; (b) positive case 2+, 400×; (c) and (d) positive cases 3+, 400×.Back to article page