SFRP1 and tongue squamous cell carcinoma: The findings also observed that SFRP1 expression was associated with clinical subtypes such as tongue squamous cell carcinoma (TSCC, HR = 0.47, p = 0.018, Figure 4e), while there was no obvious difference in SFRP1 expression for oral cavity cancer (p = 0.102, Figure 4d), implying that SFRP1 could be a viable prognostic indicator molecule in TSCC.