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Predictive Value of Tumor Load in Breast Cancer Sentinel Lymph Nodes for Second Echelon Lymph Node Metastases

机译:乳腺癌前哨淋巴结中肿瘤负荷对第二梯队淋巴结转移的预测价值

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Background: The need for routine axillary lymph node dissection (ALND) in patients with invasive breast cancer and low-volume sentinel node (SN) involvement is questionable. Accurate prediction of second echelon lymph node involvement could identify those patients most likely to benefit from ALND.Methods: A consecutive series of 317 patients with invasive breast cancer and a tumor positive axillary SN followed by ALND was reviewed. Clinicopathologic features of the primary tumor and the SN were assessed as possible predictors of second echelon lymph node involvement.Results: Second echelon metastases were found in 116/317 cases (36.6%). Frequency of second echelon lymph node involvement in patients with isolated tumor cells (ITC,N= 23), micro- (N= 101) and macrometastases (N= 193) was 13%, 20% and 48%, respectively (p< 0.001). Based on the area % of SN occupied by tumor no subgroup of patients could be selected with less than 20% second echelon lymph node involvement. However, none of the patients with SN ITC or micrometastases and a primary tumor size ≤1 cm (N = 12, 3.8%) had second echelon lymph node involvement.Conclusions: Accurately measured SN tumor load predicts second echelon lymph node involvement. However, even in patients with ITC, the second echelon lymph nodes are involved in 13% justifying ALND.
机译:背景:浸润性乳腺癌和低容量前哨淋巴结(SN)患者是否需要常规腋窝淋巴结清扫术(ALND)值得怀疑。方法:回顾性分析了317例浸润性乳腺癌,腋窝SN阳性的继发性ALND患者。评估原发肿瘤和SN的临床病理特征可能是第二梯形淋巴结受累的预测指标。结果:116/317例发现第二梯形转移(36.6%)。分离的肿瘤细胞(ITC,N = 23),微小转移(N = 101)和宏观转移(N = 193)的患者第二级淋巴结受累的频率分别为13%,20%和48%(p <0.001) )。根据肿瘤所占的SN面积百分比,不能选择第二梯形淋巴结受累少于20%的患者亚组。然而,SN ITC或微转移灶且原发肿瘤大小≤1cm(N = 12,3.8%)的患者均无第二梯形淋巴结受累。结论:准确测量的SN肿瘤负荷可预测第二梯形淋巴结受累。但是,即使在ITC患者中,第二梯形淋巴结也涉及13%的ALND证明。

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