An association with stemness has been established for a number of them in glioblastoma: A2B5, a glial progenitor cell marker, has been shown to identify glioblastoma cells with stem‐like properties.17, 18 L1CAM is evidently necessary for the maintenance and survival of glioblastoma stem‐like cells in vivo andin vitro. The gene discussed is L1CAM; the disease is glioblastoma.