MAGEC1 and cancer: In fact, immunohistochemical analysis has shown that CT antigens such as MAGE-1, MAGE-3, NY-ESO-1, and CT7 are frequently found in only a small proportion of cancer tissues (Jungbluth et al, 2000, 2002), an indication that the cancers contain both stem cells and differentiated cells (Simpson et al, 2005).