Figure 3. Representative immunohistochemical results of ANO1 positive staining.

A. Positive immunohistochemical staining of ANO1 in precancerous lesions and ESCC tissues in the sample set between 2005 and 2007 (magnification 200× and 400×). B. Positive immunohistochemical staining of ANO1 in precancerous lesions in the sample set between 1996 and 2002 (magnification 200× and 400×). mD, mild dysplasia; MD, moderate dysplasia; SD, severe hyperplasia; CIS, carcinoma in situ; ESCC, esophageal squamous cell carcinoma.