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Kaplan-Meier survival curves among IDC-DCIS and pure IDC stratified by N category for ER positive cases in the matched case-control cohort. (A) BCSS in N0; (B) BCSS in N1; (C) BCSS in N2; (D) BCSS in N3; (E) OS in N0; (F) OS in N1; (G) OS in N2; (H) OS in N3. IDC, invasive ductal breast cancer; DCIS, ductal carcinoma in situ; BCSS, breast cancer-specific survival; OS, overall survival.
