PTGDS and neoplasm: Non-tumor components included endothelial cells (expressing VWF, CDH5, ECSCR, SLCO2A1, and MYCT1), pericytes (marked by RGS5, MCAM, and PDGFRB), normal oligodendrocytes (showing PTGDS, MBP, TF, and MOG expression), and TAMs (identified by CD14, AIF1, FCER1G, FCGR3A, TYROBP, and CSF1R) (Figure 1D).