CHCs (gp100+,HTR2B+/CD45+/ CD25−/CD203c−) were readily identified in all uveal melanoma patients’ peripheral blood specimens, while CTCs (gp100+,HTR2B+/CD45−/CD25−/CD203c−) were found in only a subset (Figure 3A,B). This evidence concerns the gene HTR2B and uveal melanoma.