Fig. 1From: HER2 expression and relevant clinicopathological features in esophageal squamous cell carcinoma in a Chinese populationImmunohistochemistry showing HER2 expression in esophageal squamous cell carcinoma. a HER2 overexpression in tumor cells. Original magnification, 200×. b HER2 equivocal expression in tumor cells. Original magnification, 200×. c, d HER2 negative expression in tumor cells. Original magnification, 200 ×Back to article page