Tercan, Ismail CanZengel, BahaOzdemir, OzlemCavdar, DemetTasli, FundaAdibelli, Zehra HilalKaratas, Murat2024-08-252024-08-2520231075-122X1524-4741https://doi.org/10.1155/2023/4549033https://hdl.handle.net/11454/101121Objective. To evaluate the efficiency and safety of sentinel lymph node biopsy (SLNB) in patients with breast cancer with complete response to neoadjuvant chemotherapy (NAC). Methods. Ninety-two consecutive (T1-4 and N1-2) patients with breast cancer who had pathologic and/or clinical and radiologic axillary lymph node involvement were included. All patients received NAC. Patients with a clinical and radiologic complete response in the axilla after NAC underwent SLNB. Pathologic complete response (ypCR) was defined as the absence of residual invasive and in situ cancer, and near-complete response (ypNCR) represented in situ and/or <= 1 mm residual tumor in the breast and/or presence of malignant cell clusters (& LE;0.2 mm) and/or micrometastases (<= 2.0 mm) in the axillary lymph nodes (ALN) (ypTis/T1mi, ypN0i+/pN1mi). Results. The mean age of the 92 patients was 49.6 +/- 10.3 years and the mean follow-up was 34.0 +/- 17.8 months. With respect to breast tumors, 23 (25.0%) patients had complete and 14 (15.2%) had a near-complete response to NAC. Complete response in ALN was obtained in 39 (42.4%) patients and near-complete in six (6.5%) patients. The overall survival of the 33 patients who achieved ypCR and ypNCR was 100% and the remaining 59 patients with partial or no response to NAC was 83.1% at a mean follow-up of 34 months (p=0.063). Conclusions. In this study, no event developed in cases with ypCR and ypNCR in the breast and axilla. The persistence of the same results in long-termfollow-ups may enable the use of ypNCR as a positive prognostic marker in addition to ypCR.en10.1155/2023/4549033info:eu-repo/semantics/openAccessAdjuvantTherapyArticle2023WOS:0009223123000012-s2.0-8514653482136694670Q2Q3