CSPG4 and melanoma: TAAs identified in melanoma include vascular endothelial growth factor receptor 2 (VEGFR2), gp100, TRP-1, TRP-2, GD2, L1-CAM, cancer/testis antigen 1B and melanoma-associated chondroitin sulfate proteoglycan (MCSP; also referred to as chondroitin sulfate proteoglycan 4 (CSPG4)) [24,37].