In primary Ptch1lox/lox;GFAPcre medulloblastoma, CD24 expression showed 1.6-fold up-regulation (82.10+/-3.07%) compared to equivalent aged wild type cerebella (50.58+/-2.55%; p<0.001), and 3.15-fold up-regulation compared to P7 wild type GCPs (26.56+/-9.45%; p = 0.003) (Fig 1A, B). Here, CD24 is linked to medulloblastoma.