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Background The objective of this study was to analyze heterogeneous responses of axillary lymph node metastasis to neoadjuvant chemotherapy and to determine to what extent they differ between tumor subtypes (TN, HER2+, HR+/HER2−). Methods This retrospective, monocenter study included 72 consecutive, histologically node-positive breast cancers (cT1–4 cN1–3 cM0) diagnosed in the period from January...