PTPRC and neoplasm: Examining non‐tumor brain cell types associated with stromal tissue available from Darmanis et al (2017), showed that Neural G0 populations were found in neuroepithelial‐derived cells such as astrocytes (98%), OPCs (79%), and oligodendrocytes (86%), in CD45+ immune cells (77%), but were completely absent in vascular endothelial cells (0%).