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The recurrences of comparing breast conserving surgery with or without adjuvant radiotherapy, and mastectomy in DCIS patients ≤50 years of age.
HR: hazard ratio, CI: confidence interval, BCS + RT: breast conserving surgery with adjuvant radiotherapy, BCS: breast conserving surgery, IBTR: ipsilateral breast tumor recurrence, DCIS: ductal carcinoma in situ, MT: total mastectomy.
