Increased numbers of CD25⁺ Treg cells in patients with different specific subtypes of NHL. (A) Proportions of CD25⁺ Treg cells in patients' PBMCs and involved tissue samples compared with healthy control PBMCs and reactive nodes, respectively. (B) Proportions of CD25⁺ Treg cells in PBMCs and involved tissue samples from different specific subtypes of NHL and their comparison with control samples. Data are expressed as percentage of CD4⁺ T cells. DLBCL indicates diffuse large B-cell lymphoma; MZL, marginal zone lymphoma.