AE	Adverse Event
APC	Antigen-Presenting Cell
CA	Cancer
CI	Confidence Interval
CPS	Combined Positive Score
DFS	Disease-Free Survival
EBCTCG	Early Breast Cancer Trialists’ Collaborative Group
EFS	Event-Free Survival
FAST	Fractionation of Adjuvant Radiotherapy in Breast Cancer
fx	Fraction
Gy	Gray
HER2	Human Epidermal Growth Factor Receptor 2
HF	Hypofractionated
HR	Hormone Receptor/Hazard Ratio
ICD	Immunogenic Cell Death
ICI	Immune Checkpoint Inhibitor
IMPORT	Intensity-Modulated Partial Breast Radiotherapy
IO	Immunotherapy
IORT	Intraoperative Radiation Therapy
irAEs	Immune-Related Adverse Events
MHC	Major Histocompatibility Complex
NCT	National Clinical Trial
NSABP	National Surgical Adjuvant Breast and Bowel Project
OS	Overall Survival
PBI	Partial Breast Irradiation
pCR	Pathologic Complete Response
PD-1	Programmed Death-1
PDL-1	Programmed Death Ligand 1
PFS	Progression-Free Survival
RAPID	Randomized Trial of Accelerated Partial Breast Irradiation
RT	Radiation Therapy
SBRT	Stereotactic Body Radiation Therapy
SRS	Stereotactic Radiosurgery
TILs	Tumor-infiltrating lymphocytes
TNBC	Triple-Negative Breast Cancer
WBI	Whole Breast Irradiation