Most relevant predisposing factors for the development of UM are the presence of dysplastic nevus syndrome, choroidal nevi, ocular or oculodermal melanocytosis, familial syndromes including germline BAP1 (BRCA1-associated protein 1) mutations, and neurofibromatosis [14,15,16,17]. Here, BAP1 is linked to nevus of Ota.