The co-expression of CD133 and other CSC markers, such as the CD44 transmembrane glycoprotein involved in cell-to-cell interactions [19], the heat-stable antigen CD24 that plays a crucial role in cell adhesion and is involved in tumor metastasis [20], and CD117(c-kit) is observed in studies on ovarian CSCs. The gene discussed is KIT; the disease is neoplasm.