In line with their ability to promote tumour growth, mixing with CrT/TICs strongly enhanced EGFR signalling activation, as demonstrated by the increased phosphorylation levels of EGFR, ERK1/2, and AKT, increased the proliferation ability, as demonstrated by increased levels of Ki‐67 and PCNA (Figure 6C,D), and decreased apoptosis in xenograft tumours (Figures 6E). Here, MKI67 is linked to neoplasm.