AI	Aromatase Inhibitor
AUC	Area Under the Curve
CI	Confidence Interval
CSC	Cancer Stem Cell
DFS	Disease-Free Survival
EMT	Epithelial–Mesenchymal Transition
ER	Estrogen Receptor
FFPE	Formalin-Fixed Paraffin-Embedded
HER2	Human Epidermal Growth Factor Receptor 2
HR	Hazard Ratio
IDC	Invasive Ductal Carcinoma
IHC	Immunohistochemistry/Immunohistochemical
ILC	Invasive Lobular Carcinoma
M-W U	Mann–Whitney U
MRD	Minimal Residual Disease
NE	Not Estimable
NR	Not Reached
OS	Overall Survival
PR	Progesterone Receptor
Q1–Q3	Interquartile Range (First to Third Quartile)
ROC	Receiver Operating Characteristic
SD	Standard Deviation
SOX9	SRY-Box Transcription Factor 9
TNBC	Triple-Negative Breast Cancer