In addition, we discovered a favorable connection between LILRB1 expression and overexpression in glioma of BTLA, CD96, CD226, CD244, CD274, CTL4, HAVCR2, PDCD1LG2, and PDCD1 (Additional file 1: Supplementary Fig. 8B-J). The gene discussed is PDCD1LG2; the disease is central nervous system cancer.