Highly upregulated PD2 expression in HCC was observed in three previously established independent cohorts (Figure 1d; Table S1, Supporting Information).[11] Moreover, according to analysis of data on 212 or 42 paired tissues from GSE14520 or in‐house MA (E‐MEXP‐84 and E‐TABM‐292) datasets, PD2 expression was significantly elevated in tumor (T) compared to matched normal (MN) tissues (Figure 1e). The gene discussed is PAF1; the disease is hepatocellular carcinoma.