ERBB2 and neoplasm: The model was developed based on the principles of transparent reporting of a multivariable prediction model for individual prognosis or diagnosis (TRIPOD statement) (11), and it indicated that HR+/HER2- patients with 1-2 positive SLNs had less imaging abnormal nodes, a smaller number of positive SLNs, a greater number of positive SLNs, lower pathological tumor size, and less LVI were more likely to have ≤3 positive ALNs.