CD4 and neoplasm: The proportion of GARP+ cells in Foxp3+ Tregs from tumor tissues [9.090% (3.830%, 27.20%)] was markedly higher than that from PBs [0.3390% (0.05325%, 0.7548%), P < 0.0001], and the MFI of GARP expression by Foxp3+ Tregs from tumor tissues was more than five times that from PBs [2216 (1628, 2863) vs. 420.0 (153.0, 562.3), P < 0.0001] whereas the proportion of Foxp3+ Tregs in CD4+ T cells from tumor tissues [6.400% (4.780%, 13.20%)] was also higher than that from PBs [5.890% (4.343%, 7.520%), P = 0.0439] (Figures 1E,F).