Fig. 1

Immunohistochemical analysis of SLC39A6 in non-tumor esophageal, precancerous lesions, and ESCC tissues from Chinese Han ethnic. Representative SLC39A6 immunostaining in a non-tumor esophageal (top panel magnification ×40; middle panel magnification ×100; bottom panels magnification ×200), precancerous lesions. b LGIN and HGIN (top panel magnification ×40; middle panel magnification ×100; bottom panels magnification ×200), and c ESCC tissues (top panel magnification ×40; middle panel magnification ×100; bottom panels magnification ×200). d SLC39A6 immunoreactivity was scored in human normal esophageal squamous epithelium, precancerous lesions, and ESCC tissues. (*p < 0.05; **p < 0.01; ***p < 0.001). e The four level score (0–1, 2–4, 5–8, and 9–12) distribution of SLC39A6 protein expression in normal, precancerous lesions, and ESCC