SOX2 and squamous cell intraepithelial neoplasia: The expression patterns of SOX17 and SOX2 were semi‐quantitatively assessed in 80 cases of squamous premalignant (SIL; n = 60), including 10 cases of co‐existing SIL/AIS lesions, and malignant lesions (SCC; n = 20) (Table 1).