CD63 and chondrosarcoma: Figure 1A shows the morphology of stem cells from SHED by phase contrast microscopy. Figure 1B shows a TEM image of extracted exosomes. Figure 1C shows the molecular markers, e.g., CD63 and CD9, of exosomes and the positive results of Western blotting. In Figure 1D, exosome analysis of the particle size was conducted, and the major size range of exosomes was distributed between 100 and 200 nm in diameter. Figure 1E shows the human chondrosarcoma cells (SW1353).