acral lentiginous melanoma
noun [ C or U ] medical specialized uk/ˌæk.rəl len.tɪ.dʒɪ.nəs mel.əˈnəʊ.mə/ us/ˈæk.rəl lenˈtɪdʒ.ə.nəs ˌmel.əˈnoʊ.mə/
肢端黑色素瘤（一种罕见皮肤癌，主要发生在手掌、足底、指趾尖等部位）
a rare type of skin cancer that is usually found on the palm of the hand, on the sole of the foot, or under the fingernails or toenails