Interestingly, ALDH1A1 was not co-expressed with EpCAM (Fig. 6c), BMI1 (Fig. 6e), CD13 (Fig. 6g), CD24 (Fig. 6i), CD90 (Fig. 6k) and CD133 (Fig. 6m) which have been reported to be cancer stem cell markers in HCC. Here, PROM1 is linked to cancer.