Table 2.

Percentage of regulatory T cells in total CD3+ T cells in brain and in peripheral blood of glioma patients and controls

Source	% CD3+ T cells	% CD4+CD25−	% CD4+CD25+
A. Brain
TILs in glioma	25.1 ± 2.08	18.9 ± 1.56	6.2 ± 0.51
Control	0	0	0
B. Peripheral blood
Glioma	64.8 ± 3.14	59.22 ± 2.87	5.54 ± 0.26
Control	83.2 ± 2.76	82.78 ± 2.74	0.4 ± 0.10
P	<0.05	<0.05	<0.05

Abbreviation: TILs, tumor-infiltrating lymphocytes.