CD44 and colorectal cancer: CD44/c-Met/CD47 CTCs from breast cancer patients display metastatic potential [46]c-Met+/CD47+ CTCs as novel independent prognosticator of OS in luminal breast cancer [154, 236]c-Met as a capture antigen for CTCs and as a therapeutic target [237, 238, 280]CD47 expression on CTCs of colorectal cancer [239, 281]