FoB cells (FCER2+, CR2-) in HCC PBMCs were significantly more abundant than those in healthy PBMCs (Figure 1E), while the percentage of MZB cells (CR2+, FCER2-) in HCC PBMCs was indistinctly less than that in healthy PBMCs (Figure 1E). Here, CR2 is linked to hepatocellular carcinoma.