CTLA4 and angioimmunoblastic T-cell lymphoma: The mean proportions of CD8+TILs, CD8+PD-1+, CD8+CTLA-4+, CD8+TIM3+, CD8+LAG3+, and CD8+TIGIT+ in AITL (n = 20) (Figures 3A–E) were 40.75% (range, 4.1–78.9%), 14.39% (range, 0.19–45.53%), 9.09% (range, 0.11–44.28%), 2.63% (range, 0–10.66%), 3.36% (range, 0.22–14.93%), and 13.57% (range, 0.24–47.88%), respectively (Table 3).