However, MGH57 (grade IV glioblastoma) revealed a relatively small subpopulation of malignant cells that do not express OLIG1, OLIG2, DLL1, CCND1, and IGFBPL1, but express ALDOC and ATP1A2 (File S1; Figure S7). The gene discussed is IGFBPL1; the disease is glioblastoma.