c-Myc is overexpressed in 31–64% of medulloblastomas, the most common cerebella tumours of the central nervous system in children (Aldosari et al, 2002; Batra et al, 1994, 1995; Bigner et al, 1990; Eberhart et al, 2004; Herms et al, 2000). This evidence concerns the gene MYC and medulloblastoma.