CD274 and low grade glioma: ELISA revealed that the concentrations of sB7-H3 and sB7-H1 in the CSF were significantly lower in the patients with low-grade glioma (LGG; B7-H3, 1.129±1.256 ng/ml and B7-H1, 0.099±0.133 ng/ml) compared with the concentrations in patients with HGG (B7-H3, 7.228±6.063 ng/ml and B7-H1, 1.557±1.200 ng/ml).