HR-positive metastatic breast cancer after CDK4/6 inhibitors
Prepared with OnCo (onco.cc/prep/hr-positive-metastatic-post-cdk46/). Orientation, not medical advice; your team knows your case.
My details
What I know, what is unclear, changes to discuss
Saved in this browserMy questions
24 on the sheet- 1.What is my exact diagnosis, stage, and grade, and which tests established them?
- 2.Which biomarkers have been tested on my tumour (for example ESR1 mutation on circulating tumour DNA, retested at each progression, PIK3CA, AKT1 and PTEN alterations on tissue or plasma, HER2 immunohistochemistry score, Oestrogen receptor persistence on rebiopsy of a metastasis, Germline BRCA1 and BRCA2), and what were the results?
- 3.Which subtype is my cancer, and does that change the recommended treatment?
- 4.Is germline (inherited) genetic testing recommended for me or my family?
- 5.For my situation (esr1-mutant disease after a cdk4/6 inhibitor), which of the standard options do you recommend and why?
- 6.Am I a candidate for Elacestrant, Imlunestrant, Camizestrant or related drugs, and what side effects should I expect?
- 7.How do the results of EMERALD and EMBER-3 apply to someone like me?
- 8.For my situation (pik3ca, akt1 or pten alteration), which of the standard options do you recommend and why?
- 9.Am I a candidate for Capivasertib, Alpelisib, Inavolisib or related drugs, and what side effects should I expect?
- 10.How do the results of CAPItello-291 and SOLAR-1 apply to someone like me?
- 11.For my situation (no targetable alteration), which of the standard options do you recommend and why?
- 12.Am I a candidate for Abemaciclib, Everolimus, Exemestane, and what side effects should I expect?
- 13.How do the results of postMONARCH and evERA apply to someone like me?
- 14.For my situation (endocrine-refractory, her2-low or ultralow), which of the standard options do you recommend and why?
- 15.Am I a candidate for Trastuzumab deruxtecan, Sacituzumab govitecan, Datopotamab deruxtecan, and what side effects should I expect?
- 16.How do the results of DESTINY-Breast06 and TROPiCS-02 apply to someone like me?
- 17.For my situation (germline brca carriers), which of the standard options do you recommend and why?
- 18.Am I a candidate for Olaparib, Talazoparib, and what side effects should I expect?
- 19.How do the results of OlympiAD and EMBRACA apply to someone like me?
- 20.Are there clinical trials I could join, for example of Vepdegestrant, Gedatolisib, Giredestrant, Camizestrant?
- 21.Would a second opinion at a high-volume centre change anything, and can you help arrange it?
- 22.What supportive care (symptom control, nutrition, exercise, mental health, financial help) is available from the start?
- 23.I read that “No trial has compared the sequence of oral SERD, pathway inhibitor and antibody-drug conjugate”. How does that affect my plan?
- 24.I read that “Whether to continue a CDK4/6 inhibitor after progression gives small gains and it is unclear for whom”. How does that affect my plan?
The words I may hear
- HER2-low and HER2-ultralow: Tumours with a little HER2 (IHC 1+ or 2+ without amplification), or a trace (ultralow), which older HER2 drugs ignored but Enhertu can attack.
- Germline BRCA mutation (gBRCA): An inherited fault in the BRCA1 or BRCA2 gene, present in every cell from birth, that greatly raises the risk of breast, ovarian, prostate and pancreatic cancer and makes those cancers sensitive to PARP inhibitors and platinum.
Tests and results to bring
Biomarker results to ask for: ESR1 mutation on circulating tumour DNA, retested at each progression, PIK3CA, AKT1 and PTEN alterations on tissue or plasma, HER2 immunohistochemistry score (0, ultralow, 1+, 2+), Oestrogen receptor persistence on rebiopsy of a metastasis, Germline BRCA1 and BRCA2 (PARP inhibitor eligibility), Glycated haemoglobin and glucose before PI3K or AKT inhibitors.
Scans and tests linked to this cancer: Liquid biopsy (ctDNA).
Bring copies of scan reports, pathology and blood results, and a list of every medicine and supplement.
The treatments I may be offered
- ESR1-mutant disease after a CDK4/6 inhibitor: Elacestrant (EMERALD), imlunestrant (EMBER-3) or vepdegestrant; where available, a switch to camizestrant at the moment ESR1 appears in plasma while continuing the CDK4/6 inhibitor (SERENA-6). (Elacestrant, EMERALD, Imlunestrant, EMBER-3, Camizestrant, SERENA-6, Vepdegestrant, Liquid biopsy (ctDNA))
- PIK3CA, AKT1 or PTEN alteration: Capivasertib with fulvestrant (CAPItello-291); alpelisib with fulvestrant for PIK3CA (SOLAR-1); inavolisib with palbociclib and fulvestrant for PIK3CA-mutant disease relapsing during or soon after adjuvant endocrine therapy (INAVO120). (Capivasertib, CAPItello-291, Alpelisib, SOLAR-1, Inavolisib, INAVO120, Fulvestrant)
- No targetable alteration: Fulvestrant with abemaciclib (postMONARCH), everolimus with exemestane, or another endocrine agent; giredestrant with everolimus is emerging (evERA). (Abemaciclib, postMONARCH, Everolimus, Exemestane, evERA)
- Germline BRCA carriers: Olaparib (OlympiAD) or talazoparib (EMBRACA) in place of chemotherapy. (Olaparib, OlympiAD, Talazoparib, EMBRACA, Germline BRCA mutation (gBRCA))
- Endocrine-refractory, HER2-low or ultralow: Trastuzumab deruxtecan before chemotherapy (DESTINY-Breast06), then sacituzumab govitecan (TROPiCS-02) or datopotamab deruxtecan (TROPION-Breast01) after chemotherapy. (Trastuzumab deruxtecan, DESTINY-Breast06, Sacituzumab govitecan, TROPiCS-02, Datopotamab deruxtecan, TROPION-Breast01, HER2-low and HER2-ultralow)
From the standard of care recorded for this cancer; which apply depends on your stage and biomarkers. Ask which the team recommends and why.