As Liu et al. published a series of 7 such tumors with mostly methylation signatures of WNT-activated medulloblastomas and CTNNB1 mutations, but additional variants in miRNA-processing genes were not described [21], it would be interesting to sequence such tumors more carefully in the future to find out if more (or all) of these cases share features of both miRNA-altered PB and WNT medulloblastomas. This evidence concerns the gene CTNNB1 and medulloblastoma.