PTPRR and neoplasm: PTPR were significantly enriched for tRG gene expression compared to controls and all other tumor types, except PXA: to fetal brain (pFEWR < 0.0001), MN1-BEND2 tumors (pFEWR = 0.004), ATAB (pFEWR = 0.001), MAPK-ABC (pFEWR = 0.002) and control pediatric and adult brain (pFEWR < 0.001) (Supplementary Fig. 6 M–P, Supplementary Data 5).