A molecular fingerprint for medulloblastoma

Medulloblastoma is the most common malignant pediatric brain tumor. In mice, Ptcl haploinsufficiency and disruption of DNA repair (DNA ligase IV inactivation) or cell cycle regulation (Kipl, Ink4d, or Inkd.c inactivation), in conjunction with p53 dysfunction, predispose to medulloblastoma. To identify genes important for this tumor, we evaluated gene expression profiles in medulloblastomas from these mice. Unexpectedly, medulloblastoma expression