THY1 and neoplasm: Following expansion, flow cytometric analysis revealed the presence of PDGFRα (CD140a) and PDGFRβ (CD140b) on tumor-derived Lin-EpCAM-CD73+CD90+ mesenchymal cells and their normal counterparts (Fig. 3A, top panels, see also Figure S5B–H), as well as human lung fibroblasts (HLFib) and bone marrow-derived MSCs (BM-MSC) (Fig. 3A, bottom panels).