CD44 functions as an adhesion molecule in many aspects of tumorigenesis, including migration, proliferation, and metastasis, as well as to function as a surface marker for cancer stem cells (Du et al., 2008; Liu et al., 2011; Louderbough and Schroeder, 2011; Cho et al., 2012; Wang et al., 2012; Senbanjo and Chellaiah, 2017). Here, CD44 is linked to cancer.