Systemic Treatment of Patients With Metastatic Breast Cancer

Publication Date: January 8, 2024

Key Points

Key Points

  • Palliative care needs should be addressed for all patients at presentation of metastatic breast cancer (MBC), including situations in which no antineoplastic interventions are accessible.
  • Patients who are premenopausal can receive aromatase inhibitors only if accompanied by ovarian ablation or ovarian suppression.
  • Clinicians should recommend treatment according to pathological and biomarker features when quality (following established guidelines) testing results are available.
  • Cases should be discussed using a multidisciplinary approach with the core team including the surgeon, pathologist, oncologist, and radiation oncologist.

Table 1. Framework of Resource Stratification

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Setting
Basic Core resources or fundamental services that are absolutely necessary for any public health/primary health care system to function; basic-level services typically are applied in a single clinical interaction. Vaccination is feasible for highest need populations.
Limited Second-tier resources or services that are intended to produce major improvements in outcome such as incidence and cost-effectiveness and are attainable with limited financial means and modest infrastructure; limited-level services may involve single or multiple interactions. Universal public health interventions feasible for greater percentage of population than primary target group.
Enhanced Third-tier resources or services that are optional but important; enhanced-level resources should produce further improvements in outcome and increase the number and quality of options and individual choice. (Perhaps ability to track patients and links to registries).
Maximal May use high-resource settings’ guidelines.
High-level/state-of-the-art resources or services that may be used/available in some high-resource countries and/or may be recommended by high-resource setting guidelines that do not adapt to resource constraints but that nonetheless should be considered a lower priority than those resources or services listed in the other categories on the basis of extreme cost and/or impracticality for broad use in a resource-limited environment.
Data adapted. To be useful, maximal-level resources typically depend on the existence and functionality of all lower level resources. Maximal level recommendations are not included in this guideline.

Treatment

...eatment...

...osis, Staging, and Treatment Capacitie...


...rst-line...

...eceptor-positive (HR-positive)...

...tive...

Triple-negative...


Second-line

...In Enha...

...ve...

...tive, BRCA1/2 mutations...

...In sec...


...ird-line...

...e-negative...


...le 3. First-Line Systemic Metastatic...

...sic settings, the recommendations presume that n...

...Positive, HER2-Nega...

1.1.1

...Tamoxifen, palliative,* and best supportive...

...ted Sequential hormone therapy**...

...quential hormone therapy** (, , , )1048203...

1.1....

...fen Palliative* and best supportive care (, ,...

Limited Single-agent chemotherapy Combination...

...Single-agent chemotherapy Combination re...

....1.3...

...ic Tamoxifen Palliative* and be...

...ngle-agent chemotherapy Combination re...

...Single-agent chemotherapy Combination r...

1.1....

...amoxifen (, , , )10482...

Limited Tamoxifen (Nonsteroidal AI if a...

...hanced A nonsteroidal AI** and a CDK4/6...

....1.5

...asic Tamoxifen Bilateral oophore...

...mited Tamoxifen or alternate hormon...

Enhanced Ovarian suppression or ablation...

1.1....

...Tamoxifen (, , , )1048203

...fen or AI** Nonsteroidal if available fo...

...d Nonsteroidal AI** and a CDK4/6 inhibitor combi...

....1.7...

...Tamoxifen (, , , )1048203...

...Alternative hormonal treatment (tamox...

...Fulvestrant and a CDK4/6 inhibitor (,...

....1.8

...ic Tamoxifen (, , , )104...

...y reuse specific hormone agent (, , , )1048203...

...nhanced AI** + CDK4/6 inhibitor May reuse...

....1.9...

Basic Tamoxifen (, , , )1048203

...d Tamoxifen or (combined hormone blockage non...

...rmonal therapy (A nonsteroidal AI and a...

...-Positive...

....2.1

...alliative* and best supportive care (, , , )1...

Limited Chemotherapy, options inc...

...ced HER2-targeted therapy combin...

....2.2...

Basic Single-agent hormone therap...

...ngle-agent chemotherapy with anthracyclines,...

...ced HER2-targeted therapy (trastuzumab...

...ple-Negativ...

....3.1...

...c Palliative* and best supportive care...

...e-agent chemotherapy (, , , )1048203...

...d Single-agent chemotherapy rather than combina...

1.3....

...Palliative* and best supportive care (,...

Limited Single-agent chemotherapy Combination...

...ingle-agent chemotherapy Combination...

....3.3...

Basic Palliative* and best supportive...

...ited Single-agent chemotherapy (,...

...Addition of immune checkpoint inhibitor to c...

...Mutations (note: the recommendations for patien...

....4.1....

...en — If ER-positive, then see ER-positive recom...

...ited Tamoxifen with OA AI with...

...RPi Single-agent chemotherapy rathe...

1.4.1....

...ic Palliative* and best supportive care (,...

...le-agent chemotherapy (, , , )1048203...

...iD/Chemotherapy (, , , )1048203...

....4.2

...tive* and best supportive care (, , , )10482...

Limited Single-agent chemotherapy,...

Enhanced PARPi (in the first- thro...


...Line Systemic Metastatic Breast Cancer Treatme...

...n Basic settings, the recommendations pr...

...Positive, HER2-Negative...

....1.1

...ic Palliative* and best supportive care (, , ,...

...-agent chemotherapy, combination regimens may...

...anced Single-agent chemotherapy, combi...

2.1....

Basic Tamoxifen if previously not...

...amoxifen or single-agent chemotherapy, combinatio...

...emestane and everolimus (, , , )1048203...

2.1....

...tive* and best supportive care (, , , )1...

...oxifen or single-agent* chemotherapy, co...

...elisib in combination with endocrine therapy in c...

2.1....

...ve* and best supportive care (, , , )1048203...

...Tamoxifen or single-agent chemotherapy, combin...

...Endocrine therapy, AI, or fulvestrant ± eve...

2.1....

...therapy Palliative* care and best support...

...e-agent chemotherapy, combination regim...

...one therapy with or without targete...

....1.6...

...Palliative* and best supportive care (, ,...

...ngle-agent chemotherapy, combination reg...

...nced PARPi Single-agent chemother...

...-Positive

2.2.1

...ve* and best supportive care (HER2 testing...

...imited Chemotherapy (anthracyclines, docetaxel...

...ed (1) Trastuzumab deruxtecan....

....2.2...

Basic (Total mastectomy for ipsil...

...ted Chemotherapy with anthracyclines,...

...Trastuzumab deruxtecan. If 1 not availab...

2.2.3

...liative* and best supportive care (, , ,...

...Chemotherapy (anthracyclines, docetaxel...

...(1) Trastuzumab deruxtecan. I...

2.2....

...Palliative* and best supportive care (, , , )...

...otherapy (anthracyclines, once weekl...

...d HER2-targeted therapy combined...

...riple-Negative

2.3....

...lliative* and best supportive care (, , , )1...

...Single-agent chemotherapy; start...

...ced Single-agent chemotherapy rather...


...able 5. Maximal Setting: Third-line Options for H...

...ined = not on EML Italics = medica...

...ient’s HER2-positive advanced bre...

...a patient has not received trastuzumab emtan...

...ined with trastuzumab and capecitabine (, , ,...

...deruxtecan (, , , S)1048203...

Neratinib combined with capecitabine (...

...inib and trastuzumab (, , , W)1048...

Lapatinib and capecitabine (, , , W)1048203

...inations of chemotherapy and trastuzum...

...tuximab plus chemotherapy (, , , W)104...

...has not received pertuzumab, pertuzumab (, , , W)1...

...py (in patients with ER-positive and/or Pg...

Abemaciclib combined with trastuzuma...


...ble 6. Third-Line and Beyond Systemic M...

...tings, the recommendations presume that neithe...

...iple-Negative...

3.1.1

...lliative* and best supportive care (, , , )1...

Limited Palliative* and best supportive ca...

...hanced Single-agent chemotherapy rather...

3.1....

...ic Palliative* and best supportiv...

...ARPi (for those with known mutatio...

...PARPi (for those with known mutation status) (,...

...R-positive, BRCA mutation...

....2.1

...sic Palliative* and best supportive ca...

...PARPi (for those with known mutation status) (...

...nced PARPi (for those with known mutation sta...

HER2-Posi...

....3.1...

...iative* and best supportive care (, , , )104...

...ited Chemotherapy (, , , )...

...stuzumab emtansine (, , , )1048203...

3.3....

...ve* and best supportive care (, , , )10...

...ited Hormonal therapy (, , , )10482...

...stuzumab + hormonal therapy (, , , )1048203...

3.3....

...Not relevant (, , , )1048203...

...If a patient is receiving HER2-targ...

...ced If a patient is receiving HER2-ta...


...ASCO believes that cancer clinical trials are v...