HSP90	Heat Shock Protein 90
HER2	Human Epidermal Growth Factor Receptor 2
ADC	Antibody–drug conjugates
T-DM1	Trastuzumab emtansine
T-Dxd	Trastuzumab deruxtecan
TKI	Tyrosine kinase inhibitors
Trast	Trastuzumab
Doc	Docetaxel
Pert	Pertuzumab
Combo	Combination
PFS	Progression-free survival
OS	Overall survival
ATCC	American Type Culture Collection
DMEM	Dulbecco’s Modified Eagle’s Medium
FBS	Fetal bovine serum
EV	Empty Vector
ER	Estrogen Receptor
PgR	Progesteron Receptor
IHC	Immunohistochemistry
FISH	Fluorescence In Situ Hybridization
CT	Computer Tomography
PET	Positron Emission Tomography
HRs	Hazard ratios
HT	Hormonal Treatment