Systemic Treatment of Patients With Metastatic Breast Cancer

Publication Date: January 9, 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

Treatme...

...able 2. Diagnosis, Staging, and Tre...


...rst-line...

...ptor-positive (HR-positive)...

...-positive...

...e Patien...


...ond-line...

...In Enh...

...ive HER2-...

...e, BRCA1/2 mutations...

...-negative...


...ird-line...

...-positive...

...le-negative...


...3. First-Line Systemic Metastatic Breas...

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

...Positive, HER2-Negative...

1.1....

..., palliative,* and best supportive care should...

...Sequential hormone therapy** Aromatase...

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

1.1.2

...oxifen Palliative* and best supportive car...

...ngle-agent chemotherapy Combinat...

...d Single-agent chemotherapy Combina...

....1.3

...ic Tamoxifen Palliative* and b...

...gle-agent chemotherapy Combination regimen...

...anced Single-agent chemotherapy Combinati...

1.1.4

...c Tamoxifen (, , , )104820...

...fen (Nonsteroidal AI if available) S...

...A nonsteroidal AI** and a CDK4/6 inhibitor (,...

1.1.5

...fen Bilateral oophorectomy (, , , )10482...

...xifen or alternate hormone therapy Surgi...

Enhanced Ovarian suppression or a...

1.1....

...c Tamoxifen (, , , )10...

...oxifen or AI** Nonsteroidal if ava...

...anced Nonsteroidal AI** and a CDK4/6 inhibitor...

1.1....

...asic Tamoxifen (, , , )...

...ative hormonal treatment (tamoxifen,...

...estrant and a CDK4/6 inhibitor (, , , )1048203...

....1.8...

...ic Tamoxifen (, , , )1...

...reuse specific hormone agent (, ,...

...I** + CDK4/6 inhibitor May reuse specific hormon...

1.1....

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

...oxifen or (combined hormone blockage n...

...hanced Hormonal therapy (A nonsteroi...

...2-Positive

....2.1...

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

...motherapy, options include anthracyclines (n...

...ed HER2-targeted therapy combined...

....2.2

...ingle-agent hormone therapy (tamoxifen). Hormo...

...ingle-agent chemotherapy with anthracycline...

...2-targeted therapy (trastuzumab + pertuz...

...iple-Negati...

....3.1...

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

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

...Single-agent chemotherapy rather than...

....3.2...

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

...ngle-agent chemotherapy Combination che...

...Single-agent chemotherapy Combination c...

1.3....

...alliative* and best supportive care (PD-L1 testi...

...Single-agent chemotherapy (, , , )1048...

...d Addition of immune checkpoint inhibitor to...

...Mutations (note: the recommendati...

....4.1.a...

...ic Tamoxifen — If ER-positive, then see ER-p...

...Tamoxifen with OA AI with OA Si...

...i Single-agent chemotherapy rather th...

....4.1.b...

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

...ed Single-agent chemotherapy (,...

...anced PARPiD/Chemotherapy (, , , )10...

1.4.2

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

...ted Single-agent chemotherapy, combination r...

...ed PARPi (in the first- through t...


...le 4. Second-Line Systemic Metasta...

...ic settings, the recommendations presume...

...Positive, HER2-Negative

2.1....

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

...ed Single-agent chemotherapy, combination...

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

2.1....

Basic Tamoxifen if previously not used (...

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

...hanced Exemestane and everolimus (,...

....1.3

...sic Palliative* and best supportive car...

...imited Tamoxifen or single-agent* chemotherap...

...ced Alpelisib in combination with endocri...

....1.4...

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

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

...crine therapy, AI, or fulvestrant ± everolimus (...

2.1.5

...therapy Palliative* care and best supporti...

...Single-agent chemotherapy, combination regimens...

...mone therapy with or without targeted thera...

....1.6

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

...Single-agent chemotherapy, combina...

...RPi Single-agent chemotherapy, combinati...

...ER2-Positive...

....2.1...

...alliative* and best supportive care (HER2 tes...

...imited Chemotherapy (anthracycline...

...d (1) Trastuzumab deruxtecan. If 1...

....2.2...

...(Total mastectomy for ipsilateral in-bre...

...Chemotherapy with anthracyclines, d...

...naced (1) Trastuzumab deruxtecan. If 1 not a...

....2.3...

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

...mited Chemotherapy (anthracyclines,...

...(1) Trastuzumab deruxtecan. If 1 not avai...

....2.4...

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

...ited Chemotherapy (anthracyclines, once weekl...

...nhanced HER2-targeted therapy combined with c...

Triple-Negati...

....3.1...

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

...e-agent chemotherapy; start with sequenc...

...gle-agent chemotherapy rather than combinat...


Table 5. Maximal Setting: Third-line Options...

...lics, Underlined = not on EML Italics...

...s HER2-positive advanced breast cancer has progre...

...a patient has not received trastuzumab emtansine...

...combined with trastuzumab and capecitabine (...

...stuzumab deruxtecan (, , ,...

...mbined with capecitabine (, , , W)1048203...

...inib and trastuzumab (, , , W)1048203...

...capecitabine (, , , W)1048203

...er combinations of chemotherapy and trast...

...rgetuximab plus chemotherapy (, , , W)1048203...

...has not received pertuzumab, pertuzumab (,...

...herapy (in patients with ER-positive and/or...

...clib combined with trastuzumab and fulvestrant (,...


...-Line and Beyond Systemic Metastatic Breast Cance...

...sic settings, the recommendations p...

...e-Negative...

3.1....

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

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

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

3.1....

...ative* and best supportive care (, , , )1048...

...Pi (for those with known mutation st...

Enhanced PARPi (for those with kno...

HR-positive, BRCA muta...

3.2....

...tive* and best supportive care (, , , )1048...

...Pi (for those with known mutation sta...

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

...ER2-Positive...

3.3....

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

...ed Chemotherapy (, , , )1048203...

...rastuzumab emtansine (, , , )104820...

3.3....

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

...Hormonal therapy (, , , )1048203...

...nhanced Trastuzumab + hormonal therapy...

3.3....

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

...f a patient is receiving HER2-targeted therapy an...

...nhanced If a patient is receiving HE...


...believes that cancer clinical trials are vital to...