Also, researchers proposed to use stage-specific embryonic antigen 1 (SSEA-1/LeX) as a tumor-associated carbohydrate epitope for glioblastoma stem cells, as the population of SSEA-1+ (LeX+) cells exhibited high tumorigenic potential, which corresponds to the phenotypic characteristics of glioblastoma stem cells [49]. The gene discussed is FUT4; the disease is glioblastoma.