“…From Levene’s work onwards, the term animal-type melanoma began to spread in dermatopathology to designate this type of lesion, although it already seemed at the time that this nomenclature was too weak and too generic. More in detail, as several papers began to describe this entity in humans [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ], it became clear that, in humans, it was less malignant than the homologous disease of gray horses [ 10 ], making this nomenclature more and more insufficient to define its salient features.…”