<unk>  is a rare cutaneous condition, a virulent variant of nodular melanoma.<unk>  is a subtype of nodular melanoma, the most aggressive form of melanoma (a skin cancer).<unk> , like all types of melanoma, starts in the cells that make melanin, which is the protective pigment that gives skin color.<unk>  is most commonly found on the torso but may be found in unexpected places like the nasal mucous membranes and the rectum. Sometimes<unk>  may develop on moles on your skin, but it usually occurs out of nowhere on normal skin.<unk>  can be treated if it's diagnosed early, but the disease progresses very rapidly and has a worse prognosis than many other types of melanoma.
Polypoid melanoma
Pseudomelanoma
Nodular melanoma
Lentigo maligna melanoma
Acral lentiginous melanoma
Superficial spreading melanoma
Amelanotic melanoma
Animal-type melanoma