Similarly, medulloblastomas initiated by conditional activation of SmoM2 either prenatally, using hGFAP-Cre, or postnatally, using tamoxifen-inducible Math1-CreER, are histologically and molecularly indistinguishable, but show different propensities for anchorage-independent growth in vitro19. This evidence concerns the gene HGFAC and medulloblastoma.