An amelanotic melanoma that involves the zone of skin. The disease is amelanotic skin melanoma (MONDO_0005208). Also known as: amelanotic cutaneous (skin) melanoma, amelanotic malignant melanoma (of skin), amelanotic malignant melanoma of skin, amelanotic malignant melanoma of the skin, amelanotic malignant skin melanoma, amelanotic melanoma of skin, amelanotic melanoma of the skin, amelanotic melanoma of zone of skin.