CD24 and neoplasm: Consistent with this result, MYC HME cells had little to no surface expression of CD24, a surface marker commonly lost on cancer stem cells (also called tumour initiating cells) (Supplementary Fig. S6m).55,56 It was reported that the gene expression profile of CL-TNBC tumours closely clusters with that of so-called “mesenchymal stem-like” tumours.