On the other hand, CD24 expression is downregulated by Twist, -catenin/TCF, miR-34a and miR-146a, and histone deacetylase (HDAC) in breast cancer, colorectal, oral squamous cell carcinoma, and HDAC-positive colorectal cancer, respectively [34, 38–41]. The gene discussed is HDAC9; the disease is oral cavity squamous cell carcinoma.