PLD1 expression was correlated with poor prognosis of GBM patients in cohorts based on The Cancer Genome Atlas (TCGA) GBM expression profile database (Cancer Genome Atlas Research Network, 2008; https://tcga-data.nci.nih.gov/tcga/tcgaDownload.jsp) (Figure 1A). The gene discussed is PLD1; the disease is glioblastoma.