SOX10 and melanoma: We assessed expression of ROPN1B, NY-ESO-1 (single protein from CTAG1A or CTAG1B genes), MLANA and SOX10 (used here as a melanoma tumour marker) at the protein level by multispectral immunohistochemistry on melanoma tissue microarrays (TMAs) comprising two or three cores from 61 patient tumours (Table 1).