CSPG4 and cancer: Interestingly, in an experiment where inbred C57BL/6 mice were injected with HCC cell lines (H22), we observed more carcinogenesis (2 out of 3, denoted as a yellow oval and a white circle) in the C57BL/6 mice that received the higher NG2/CSPG4-expressing H22 two weeks post-cell injection (Figure 3(Ca)) than those that received the parental control cell line at the same time (Figure 3(Cb), cancer-free, Supplementary information).