Fig. 2

Serum sCTLA-4 levels in patients with glioma and in controls. Patients with glioma have a statistically higher concentration of circulating sCTLA4 than control subjects (p < 0.05). Median level of sCTLA-4 for the patients with high-grade glioma was higher than those in the low-grade glioma group and control subjects (all p < 0.05). sCTLA-4, soluble cytotoxic T-lymphocyte antigen 4