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mas·tec·to·my AHD[mă-stĕkʹtə-mē] D.J.[mæˈstektəmiː]K.K.[mæˈstɛktəmi]n.（名词）【复数】 mas.tec.to.mies - Surgical removal of all or part of a breast, sometimes including excision of the underlying pectoral muscles and regional lymph nodes, usually performed as a treatment for cancer.乳房切除术：切除乳房或部分乳房的外科手术，包括位于下层的胸部肌肉和局部淋巴节，通常作为治疗乳腺癌而实施的手术
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