乳腺癌新辅助化疗后前哨淋巴结活检的意义

目的比较研究乳腺癌新辅助化疗对前哨淋巴结活检及腋窝淋巴结状况的影响。方法对2005年6月至2007年6月165例I、Ⅱa、Ⅱb、Ⅲ期乳腺癌行^99mTc联合亚甲蓝示踪剂注射后前哨淋巴结活检术，再行腋窝淋巴结清扫术；其中65例Ⅱb、Ⅲ期先行3个疗程新辅助化疗后再行前哨淋巴活检及腋窝淋巴结清扫术，另100例I、Ⅱa期直接行前哨淋巴结活检及腋窝淋巴结清扫。结果行新辅助化疗组和未行新辅助化疗组每例平均腋窝淋巴结检出数分别为14．60枚和14．74枚（P〉0．05）、前哨淋巴结数分别为1．46枚和1．5枚（P〉0．05）、SLN检出率分别为96．7％和96．9％（P〉0．05）、SLN假阴性率分别为4．6％和4％（P〉0．05）。结论新辅助化疗后乳腺癌腋窝淋巴结检出数、前哨淋巴结的确认率和假阴性率与未行新辅助化疗患者的结果一致，新辅助化疗后前哨淋巴结活检能准确预测腋窝淋巴结的状况。

The significance of axillary sentinel lymph node biopsy after neoadjuvant chemotherapy

Objective Comparing the influence of neoadjuvant chemotherapy on sentinel lymph node biopsy and axillary lymph nodal staging. Methods From June 2005 to June 2007 one hundred and sixty five breast cancer patients of stage Ⅰ,Ⅱa,Ⅱb and Ⅲ underwent sentinel lymph node biopsy(SLNB) using 99mTc combining methylene blue dye as tracer to help axillary lymph node dissection(AND) were retrospectively reviewed. Sixty five patients staged Ⅱb or Ⅲ were treated with three circles neoadjuvant chemotherapy prior to SLNB and AND , another one hundred patients staged ⅠorⅡa had SLNB and AND directly without neoadjuvant chemotherapy.Results Average 14.60 axillary lymph nodes were retrieved in patients had neoadjuvant chemotherapy and 14.74 lymph nodes in patients did not have neoadjuvant chemotherapy(P>0.05),a mean number of 1.46 sentinel lymph nodes in neoadjuvant chemotherapy group and 1.5 sentinel lymph nodes in non-neoadjuvant chemotherapy(P>0.05), sentinel lymph node identification rate 96.9% in neoadjuvant chemotherapy group and 97% in non-neoadjuvant chemotherapy(P>0.05), the false negative rate was 4.6% in neoadjuvant chemotherapy group and 4% in non-neoadjuvant chemotherapy group(P>0.05). Conclusions The mean number of lymph nodes,sentinel lymph nodes,SLN identification rate and false-negative rates after neoadjuvant chemotherapy are similar to those seen in patients without neoadjuvant chemotherapy.The SLNB can accurately predict lymph node status of axillary lymph node following neoadjuvant chemotherapy.