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  • Title: Axilla lymph node dissection can be safely omitted in patients with 1-2 positive sentinel nodes receiving mastectomy: a large multi-institutional study and a systemic meta-analysis.
    Author: Gao W, Lu S, Zeng Y, Chen X, Shen K.
    Journal: Breast Cancer Res Treat; 2022 Nov; 196(1):129-141. PubMed ID: 36076127.
    Abstract:
    PURPOSE: This study aimed to evaluate whether axillary lymph node dissection (ALND) can be omitted in patients with 1-2 positive sentinel lymph nodes (SLNs) who received total mastectomy (TM). METHODS: Consecutive breast cancer patients with 1-2 positive SLNs were retrospectively reviewed from a multi-institutional database. Patients were divided into sentinel lymph node biopsy (SLNB) group and ALND group. Administration of adjuvant chemotherapy and survival were compared between groups. To further verify the results, a meta-analysis was also conducted. RESULTS: Among the 1161 enrolled patients, 893 (76.9%) received ALND and 268 (23.1%) underwent SLNB alone. Administration of chemotherapy was comparable between the two groups (91.1% vs. 90.6%, P = 0.798), which was consistent in TM (P = 0.638) and BCS cohort (P = 0.576). After a median follow-up of 36 months, no significant difference was observed between the two groups in recurrence-free survival (P = 0.583) regardless of surgery of breast. During further meta-analysis, 13 out of 4733 relative studies reported the association of axillary surgery and disease-free survival (DFS) or overall survival (OS) in 1-2 positive SLNs patients. Pooled analysis showed no difference in adjusted DFS (HR 0.84, 95% CI 0.70-1.02) or OS (HR 1.02, 95% CI 0.93-1.11) between SLNB and ALND groups. Survival benefit of ALND remained non-significant after restricting the analysis in four studies with patients only receiving BCS, or in three studies with patients only receiving TM. CONCLUSION: Further ALND does not impact adjuvant chemotherapy administration or disease outcome in breast cancer patients with 1-2 positive SLNs treated with TM.
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