The correlation of MN1-BEND2 tumor transcriptomes with early NSC types (NEC and vRG) and MAPK-ABC tumor, PTPR, and PXA transcriptomes with later NSC types (tRG and oRG) suggests that mutagenic events in early brain development may manifest as tumors in both childhood and adulthood, or that some RG or RG-derived progenitors persist beyond adolescence. This evidence concerns the gene PTPRR and neoplasm.