石志强, 邱鹏飞, 刘雁冰, et al. Selective elimination of axillary surgery staging after neoadjuvant chemotherapy for HER2 positive and triple-negative breast cancer[J]. China Oncology, 2020, 30(3): 186-191.
石志强, 邱鹏飞, 刘雁冰, et al. Selective elimination of axillary surgery staging after neoadjuvant chemotherapy for HER2 positive and triple-negative breast cancer[J]. China Oncology, 2020, 30(3): 186-191. DOI: 10.19401/j.cnki.1007-3639.2020.03.005.
Selective elimination of axillary surgery staging after neoadjuvant chemotherapy for HER2 positive and triple-negative breast cancer
Background and purpose: Neoadjuvant chemotherapy (NAC) has become the standard treatment mode for locally advanced breast cancer patients. This study aimed to explore the feasibility of selective elimination of axillary surgery staging after NAC in human epidermal growth factor receptor 2 (HER2) positive and triple-negative breast cancer (TNBC) patients
and to assess which patients would acquire greater benefits from it. Methods: From Jan. 2010 to Aug. 2018
865 patients who underwent surgery after NAC in Shandong Cancer Hospital and Institute were included in this retrospective study to analyze the correlation between clinicopathological characteristics of HER2 positive and TNBC patients and pathologically negative axillary lymph nodes after NAC (ypN
0
). Results: Among the 184 (21.3%) HER2 positive and TNBC patients receiving NAC
tumor staging
lymph node staging and Ki-67 before NAC
clinically node-negative (ycN
0
)
breast radiologic complete response (brCR) and breast pathologic complete response (bpCR) after NAC were correlated with ypN
0
(P0.05). Clinical lymph node staging before NAC (OR=0.363
P0.001)
bpCR (OR=11.285
P0.001) and ycN
0
(OR=4.995
P0.001) were the independent predictors of ypN
0
. Among 37 patients with clinically nodal-negative breast cancer before (cN
0
) and after (ycN
0
) NAC
17 of 17 (100.0%) with and 18 of 20 (90.0%) without a bpCR had no evidence of residual nodal disease (P=0.178). Among 42 patients with cN
1
to ycN
0
23 of 24 (95.8%) with and 10 of 18 (55.6%) without a bpCR had no evidence of residual nodal disease (P0.001). Patients without a bpCR had a relative risk for nodal residual metastases of 10.56 (95% CI: 2.720-41.003; P0.001) compared with those with a bpCR in cN
1
group. Conclusion: In HER2 positive an
d TNBC patients
bpCR is highly correlated with nodal status after NAC. The risk of axillary lymph nodes residual metastases after NAC in the patients of bpCR with cN
0
and cN
1
to ycN
0
was less than 5%
making it possible to selectively eliminate axillary surgery staging.