<unk>  is an aggressive type of skin cancer that is not caused by sunlight. Melanoma is a group of serious skin cancers that arise from pigment cells (melanocytes);<unk>  is a kind of<unk>  skin melanoma.<unk>  is the most common subtype in people with darker skins and is rare in people with lighter skin types. It is not caused by exposure to sunlight or UV radiation, and wearing sunscreen does not protect against it.<unk>  is commonly found on the palms, soles, under the nails, and in the oral mucosa. It occurs on non-hair-bearing surfaces of the body, which have not necessarily been exposed to sunlight. It is also found on mucous membranes. The absolute incidence of<unk>  is the same for people of all skin colors, and has not changed significantly for decades. However, because rates of other melanomas are low in non-white populations,<unk>  is the most common form of melanoma diagnosed amongst Asian and sub-Saharan African ethnic groups. The average age at diagnosis is between sixty and seventy years.
Acral lentiginous melanoma
Lentigo maligna melanoma
Superficial spreading melanoma
Polypoid melanoma
Nodular melanoma
Melanocytic nevus
Animal-type melanoma
Pseudomelanoma