CD4 and angioimmunoblastic T-cell lymphoma: Figures 5A,  5F show the common expression characteristics of PD-1 and CD10 in AITL cells of the sCD3-CD4+ subset, respectively. The expression of PD-1 and CD10 in AITL cells was comprehensively compared horizontally and vertically. Both in the comparison of the clonal T cells of each subtype of PTCLs and the comparison with the autologous background T cells, the characteristics of significantly high expression were shown (Figures 5B, , D,G, –J).