CD44 and breast cancer: As an example, ESA+/CD44+/CD24−, and ALDH1+ were detected in breast cancer stem cells (BCSCs); CD133+ in colon, glioblasoma, gastric and lung; EpCAM, CD133/EpCAM, CD90+ ESA+CD133+ CD44+CD24+ in liver; and ESA+/CD44+/CD24+ in pancreatic CSCs (Table 1) [25, 30–32].