Thanks to these primordial studies, much effort has been focused on detecting CSCs in different tumor tissues, such as the ovary, prostate, lung, pancreas, neck and head, and colon [11–17], and many glycoproteins, including CD44, CD133, CD38, CD24, CD34, and CD73, have been linked to stem-like properties [18]. This evidence concerns the gene CD44 and neoplasm.