KRT13 and esophageal squamous cell carcinoma: Lower KRT13 expression, in comparison to the matching normal squamous tissues, was found in oral dysplasia, squamous carcinomas and carcinoma in situ [5], esophageal squamous cell carcinoma [6], bladder cancer [7], lymph node-positive uterine cervix cancer [8], and head and neck squamous cell carcinoma cell lines [9].