An analysis of loss of heterozygosity of 1p and 19q (LOH 1p/19q) showed higher PD-L1 expression in gliomas without LOH 1p/19q (n = 54) compared to LOH 1p/19q aberrant gliomas (n = 4, p > 0.05 (Fig. 3c). This evidence concerns the gene CD274 and glioma.