We recently reported that SIP1 expression was inversely correlated with E-cadherin expression in HNSCC cells, and that the downregulation of E-cadherin and upregulated nuclear localization of SIP1 were independently correlated with delayed neck metastasis in stage I/II tongue squamous cell carcinoma (TSCC) [9]. Here, CDH1 is linked to tongue squamous cell carcinoma.