Age

40–any

Sex

FEMALE

Healthy volunteers

Not accepted

Individuals assigned Female at birth, age 40 and older
Breast conserving surgery without SLNB or ALND
All patients should be capable of giving informed consent,
Willingness and ability to comply with scheduled visits, treatment plans, laboratory tests, and other study procedures.
Histologically confirmed invasive ductal carcinoma
Individuals with pathologic tumor size \<3cm
Patients in whom partial breast is deemed technically not possible due to breast size will be considered screen failures and excluded from the trial.
Clinically and radiologically node-negative (no palpable nodes, negative axillary imaging)
Electrocorticography (ECOG) performance status 0-2

Radiation After No Axillary Nodal Sampling