In Vivo: Melanin probe-1 (3.7 MBq; tail vein) exhibits high tumor targeting efficiency. Melanin probe-1 shows high in vivo stability and favorable pharmacokinetic properties such as fast clearance from urinal system and almost background level of uptakes for all of the major organs at 2 h. The high selectivity and specificity of Melanin probe-1, as evidenced by the high tumor-to-non tumor ratios, highlight that Melanin probe-1 PET has high potential to improve the melanoma detection.