PDGFRB and neoplasm: Tumor vessels are mainly neoplastic blood capillaries that contain endothelial cells (ECs) and pericytes (PCs).[23] To provide a criterion for the isolation of TPCs, we first identified TPC‐harboring capillaries in tumor tissues using the recognized PC antigens NG2 and PGDFRβ.[24] Our results showed that tumor capillaries with diameters between 10 and 40 μm were mainly covered with NG2+ and PDGFRβ+ TPCs (Figure 1A,B).