CSPG4 and melanoma: Staining for MCSP (CSPG4) in 625 SLNs from 492 patients with early-stage melanoma (Fig. 1a,b and Extended Data Fig. 1a) identified two morphologically distinct MCSP+ cell populations: large cells with a diameter of about 20 μm and bright fluorescence and small cells with a diameter of half the size (10 μm) and often weaker fluorescence staining (Fig. 1c and Extended Data Fig. 1b).