Prevalence of TYRP1 expression differed between melanoma subtypes (Supplementary Table 3), with uveal melanoma showing the highest frequency of positive samples with any TYRP1 expression (91%, n = 41 of 45) followed by mucosal melanoma (74%, n = 20 of 27) and cutaneous melanoma (59%, n = 80 of 135). This evidence concerns the gene TYRP1 and mucosal melanoma.