Breast Cancer Treatment Options
| Treatment options | Invasive BC by stage | |
| Stage | Treatment option | |
| 1. BCS alone | Stages I and II | BCS + RT (34%) |
| 2. BCS + RT | BCS + RT + chemo (17%) | |
| 3. BCS + RT + chemo | Mastectomy alone (17%) | |
| 4. BCS + chemo | Mastectomy + chemo (12%) | |
| 5. Mastectomy alone | Stage III | Mastectomy + RT + chemo (48%) |
| 6. Mastectomy + RT | BCS + RT + chemo (15%) | |
| 7. Mastectomy + chemo | Mastectomy + chemo (13%) | |
| 8. Mastectomy + RT + chemo | Mastectomy alone (7%) | |
| 9. RT or chemo | Stage IV | RT or chemo (48%) |
| 10. No surgery, RT, or chemo | No surgery, RT, or chemo (21%) | |
| Mastectomy + RT + chemo (7%) | ||
| Mastectomy + chemo (7%) | ||
BCS = breast-conserving surgery; RT = radiation therapy; chemo = chemotherapy, including targeted therapy and immunotherapy drugs.
Source: (5).