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为分析研究早期乳腺癌保乳疗法(BCT)同侧乳腺癌复发(IBTR)的临床表现、IBTR的危险因素及其在日本民族族群中对发生癌症远距离转移的影响而进行长期随访。选取1986～1993年18个主要的乳腺癌治疗机构中接受乳房保存治疗的直径≥3 cm的
Long-term follow-up was conducted to analyze the clinical manifestations of ipsilateral breast cancer recurrence (IBTR) in early breast conserving therapy (BCT), the risk factors for IBTR and their impact on distant metastasis of cancer in Japanese ethnic groups. Choose from 1986 to 1993, 18 major breast cancer treatment institutions received breast preservation treatment of diameter ≥ 3 cm