ABCA9 and glioblastoma: In addition, four genes were differentially expressed in opposite directions among 28 tumors, ABCA9 was upregulated in LAML and down-regulated in the remaining 27 tumors, NPPA was upregulated in GBM and LGG and down-regulated in the remaining 26 tumors, while PBK and H2AC11 were down-regulated in TGCT and up-regulated in the rest 27 tumors.