Ultrasound-based radiomics nomogram: A potential biomarker to predict axillary lymph node metastasis in early-stage invasive breast cancer.

•Radiomics uses features extracted from US images to reflect intratumor heterogeneity.•US-based radiomics score was an independent predictor of ALN metastasis.•A radiomics nomogram outperformed clinical model could facilitate to predict ALN metastasis in patients with EIBC.