When stratified based on GBM subtype, analysis of ERVK3-1 demonstrated that classical GBM samples had significantly higher ERVK3-1 expression relative to mesenchymal (5.32 fpkm versus 3.74 fpkm, corrected p < 0.0001) and IDHm GBM samples (5.32 fpkm versus 4.11 fpkm, p = 0.022). The gene discussed is ERVK3-1; the disease is glioblastoma.