PRDM6 and medulloblastoma: Notably, we found complex SVs in the noncoding region in the driver mutation-negative case (PD2107), which included a subtype-specific SE of group 4 medulloblastomas near the PRDM6 gene, the overexpression of which has been suggested as a driver of medulloblastoma (Northcott et al, 2017) (Fig. 6A).