The OncoAlert HORIZONS Series: Breast Cancer
What happens when Watch & Wait fails?
How Mechanism based therapies are rewriting Cancer Care
WATCH THE ENTIRE VIDEO HERE👉
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In this session, we explore: Therapeutic options after CDK4/6 inhibitor + endocrine therapy in HR+, HER2– advanced/metastatic
#BreastCancer , and the emerging role of SERD-based combination strategies in this setting.
👩⚕️ Faculty: Dr. Sherene Loi
@LoiSher Peter MacCallum Cancer Centre, Australia 🇦🇺 Dr. Elisa Agostinetto
@ElisaAgostinett
Institut Jules Bordet, Belgium 🇧🇪
The post-CDK4/6 inhibitor landscape in HR+/HER2– advanced breast cancer represents one of the most pressing unmet needs in oncology. While CDK4/6 inhibitors combined with endocrine therapy have firmly established themselves as the frontline standard, disease progression on this backbone remains nearly universal, driven by heterogeneous resistance mechanisms including ESR1 mutations, PI3K/AKT/mTOR pathway alterations, and RB1 loss.
This biological diversity highlights the limitations of one-size-fits-all approaches. Next-generation oral selective estrogen receptor degraders (SERDs)—such as elacestrant, camizestrant, and imlunestrant—are reshaping the field.
These agents achieve more complete estrogen receptor degradation than fulvestrant, show activity in ESR1-mutant disease, and are being actively evaluated in combination strategies with CDK4/6 and targeted therapies.
Together, they are helping shift the post-CDK4/6 setting toward a more dynamic, biomarker-informed treatment paradigm.
This OncoAlert Horizons educational series was supported by an unrestricted educational grant from Roche.
All content was independently developed and fully controlled by the faculty.
OncoAlert Horizons faculty:
@LoiSher
@JavierCortesMD
@BarbaraPistill2
@BianchiniGP
@ElisaAgostinett
Sybille Loibl
Rupert Barsch
François-Clément Bidard
Cristina Saura
Pinging our
#BreastCancer Faculty
@matteolambe
@aftimosp
@E_de_Azambuja
@DrSGraff
@ErikaHamilton9
@double_whammied
@maryam_lustberg
@raalbany
@hoperugo
@stolaney1
@LoiSher
@SirohiBhawna
@jamecancerdoc
@JavierCortesMD
@JaniceTNBCmets
@Prof_Nadia_H
@nataliagandur
@acampsmalea
@FernandoOnco
@ElisaAgostinett
@to_be_elizabeth
@realbowtiedoc
@Lucarecco
@GaiaGriguolo
@JankovicK
@MarioBalsaMD
@Onco_Cifu88