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概述肛管直肠恶性黑色素瘤(anorectal malignant melanoma , AMM )由Moore ( 1857 )首次报道,是一种少见且预后极差的肿瘤,具有很强的侵袭性和转移性,临床极易误诊。肛管直肠黑色素瘤占全部恶性黑色素瘤的l %一2 %,占大肠肿瘤的0 . 1 % ? 1 . 9 % ,占肛管恶性肿瘤的0 . 25 % ? 2 . 5 %。好发于50 岁以上女性238( 77 . ...</br> generated by yvsou girl

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