In univariable logistic regression, low ER and PR expression—defined by values below the ROC-derived thresholds—were associated with substantially lower odds of SLNB positivity compared with high expression, whereas tumours with a low Ki-67 index (≤17.5%) paradoxically exhibited higher odds of nodal metastasis than those with high Ki-67. This evidence concerns the gene MKI67 and neoplasm.