THY1 and liver cancer: In this study, we found that CD90+ cells formed a higher proportion of liver cancer cells cultured in MRC-5-CM than that of control cells; CD90+/CD45- cells were more common in Bel-7402-(MRC-5)-CM and MHCC-LM3-(MRC-5)-CM cells, but less common in HepG2-(MRC-5)-CM and SMMC-7721-(MRC-5)-CM cells, relative to controls.