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Acral lentiginous melanoma is a kind of lentiginous skin melanoma. Melanoma is a potentially serious skin cancer that arises from pigment cells (melanocytes). Although acral lentiginous melanoma is rare in Caucasians and people with lighter skin types, it is the most common subtype in people with darker skins. Acral lentiginous melanoma is observed on the palms, soles, under the nails and in the oral mucosa. It occurs on non hair-bearing surfaces of the body, which may or may not be exposed to sunlight. It is also found on mucous membranes. It is the most common form of melanoma diagnosed amongst Asian and Black ethnic groups. The average age at diagnosis is between sixty and seventy years. ==Signs and symptoms== Typical signs of acral lentiginous melanoma include * longitudinal tan, black, or brown streak on a finger or toe nail * pigmentation of proximal nail fold * areas of dark pigmentation on palms of hands or soles of feet Warning signs are new areas of pigmentation, or existing pigmentation that shows change. If caught early, acral lentiginous melanoma has a similar cure rate as the other types of superficial spreading melanoma. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「acral lentiginous melanoma」の詳細全文を読む スポンサード リンク
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