Figure 11.

Data from a female patient, 62 years old. (A). Right breast probing and mixed echogenic lesions, not parallel to the skin, irregular in shape, lobulated at the edge, and echogenic in the rear; (B). No suspicious lymph node echo was detected in the right axilla. Pathological findings: invasive ductal carcinoma, no metastases in sentinel lymph nodes; (C). The waterfall chart of the XGBoost model predicting the process of SLN metastasis in this case. For this patient, the predicted outcome was 19.2% (the baseline was 44.5%), and the favorable factors mainly included the margin of the lesion being lobulated, no suspicious lymph nodes being found, no obvious distortion of the tissue structure around the lesion, and no calcification in the lesion.