Correlation of ultrasound features and axillary lymph node metastasis in patents with stage T1 breast cancer
Objective To investigate the correlation between conventional ultrasound signs,quantitative parameters of real-time shear wave elastography,and ipsilateral axillary lymph node metastasis in stage T1 breast carcinoma patients(maximal diameter ≤20 mm).Methods A total of 213 patients with stage T1 breast cancer who underwent breast ultrasound examination at Shanxi Bethune Hospital between November 2021 and December 2023 were selected,according to the presence or absence of axillary lymph node metastasis on postoperative pathology,they were divided into the lymph node metastasis group(57 cases)and the lymph node non-metastasis group(156 cases).By taking the pathologic diagnosis of lymph node metastasis as the dependent variable and the ultrasonographic signs as independent variables,conventional ultrasound signs of the primary tumour and ipsilateral suspicious axillary lymph nodes,quantitative parameters of real-time shear wave elastography of the primary tumour were subjected to univariate analysis in both groups of patients,then analysis of the relationship between ultrasound signs and ipsilateral axillary lymph node metastases using logistic regression modelling.Results Univariate analysis showed that the distinctions between groups of primary tumour hyperechoic halo,Emax,and maximum cortical thickness of suspicious axillary lymph nodes were statistically significant(P＜0.05).Multifactorial binary logistic regression models showed that echogenic halo(OR=3.604,P=0.034),high Emax(OR=1.013,P＜0.001),and the maximum cortical thickness of axillary lymph nodes ≥3.0 mm(OR=5.970,P=0.001)were the independent hazard factors for stage T1 breast cancer.Conclusion Stage T1 breast cancer patients having hyperechoic halo,high Emax,and axillary suspicious lymph nodes with maximum cortical thickness ≥3 mm are more likely to develop ipsilateral axillary lymph node metastasis.
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