[From cytogenetics to cytogenomics of brain tumors: 1. Medulloblastoma].

Medulloblastoma is the most frequent malignant brain tumor of the posterior fossa in children. As prognostic factors for this disease are not well-established, it seemed important to identify genetic features in these tumors. We present data provided by recent studies on conventional cytogenetic, molecular cytogenetic and molecular genetic in correlation with prognosis in these tumors.