• Department of Breast Surgery, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P. R. China;
ZUO Huaiquan, Email: 13982772996@163.com
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Objective To explore the factors associated with non-sentinel lymph node (NSLN) metastasis in early breast cancer patients with 1-2 positive sentinel lymph nodes (SLN), seeking the basis for exempting some SLN-positive patients from axillary lymph node dissection. Methods A total of 299 early breast cancer patients who were diagnosed with positive sentinel lymph node (SLN) biopsy and underwent axillary lymph node dissection at the Affiliated Hospital of Southwest Medical University from January 2019 to April 2023 were selected. Univariate analysis was performed on the clinical and pathological data of patients, and multivariate logistic regression analysis was conducted to identify factors related to axillary non-sentinel lymph node (NSLN) metastasis of patients with SLN positive in early breast cancer. GraphPad Prim 9.0 was used to draw receiver operating characteristic (ROC) curve, and the area under curve (AUC) of ROC was calculated to quantify the predictive value of risk factors. Results Among the 299 breast cancer patients with 1-2 SLN positive, 101 cases (33.78%) were NSLN positive and 198 cases (66.22%) were NSLN negative. Univariate analysis showed that the number of positive SLN, clinical T staging and lymphovascular invasion were related to the metastasis of NSLN (P<0.001). Multivariate logistic regression analysis indicated that having 2 positive SLN [OR=3.601, 95%CI (2.005, 6.470), P<0.001], clinical T2 staging [OR=4.681, 95%CI (2.633, 8.323), P<0.001], and presence lymphovascular invasion [OR=3.781, 95%CI (2.124, 6.730), P<0.001] were risk factors affecting axillary NSLN metastasis. The AUCs of the three risk factors were 0.623 3, 0.702 7 and 0.682 5, respectively, and the AUCs all were greater than 0.6, suggesting that the three risk factors had good predictive ability for NSLN metastasis. Conclusion The number of positive SLN, clinical T staging, and lymphovascular invasion are related factors affecting NSLN metastasis in early breast cancer patients with positive SLN, and these factors have guiding significance for whether to exempt axillary lymph node dissection.

Citation: WU Jiaxing, GUO Xiaodie, GUAN Guilin, ZUO Huaiquan. Analysis of related risk factors for non-sentinel lymph node metastasis in early breast cancer patients with 1-2 positive sentinel lymph nodes. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2023, 30(12): 1457-1463. doi: 10.7507/1007-9424.202108020 Copy

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