TP53 and esophageal squamous cell carcinoma: TP53, NFE2L2, CDKN2A and FBXW7 were more frequently mutated in ESCC or dysplastic samples, while NOTCH family genes, PPM1D, ZFP36 L2, FAT1, CHEK2 and PAX9 were more frequently mutated in normal epithelium.