FSTL5 and hepatocellular carcinoma: Zhang et al found that FSTL5 could promote HCC cell apoptosis by affecting WNT/β‐catenin signalling in vitro.20 In our study, we first studied the effect of FSTL5 on HCC growth both in vivo and in vitro and found that overexpressing FSTL5 could effectively inhibit the growth of HCC cells and HCC xenografts.