Please use this identifier to cite or link to this item: http://hdl.handle.net/11054/2099
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dc.contributorLoft, M.en_US
dc.contributorLok, S.en_US
dc.contributorDe Boer, R.en_US
dc.contributorMalik, L.en_US
dc.contributorGreenberg, S.en_US
dc.contributorYeo, B.en_US
dc.contributorAnton, A.en_US
dc.contributorNottage, M.en_US
dc.contributorWong, Vanessaen_US
dc.contributorNott, L.en_US
dc.contributorCollins, I.en_US
dc.contributorTorres, J.en_US
dc.contributorBarnett, F.en_US
dc.contributorLombard, J.en_US
dc.contributorGibbs, P.en_US
dc.contributorGately, L.en_US
dc.date.accessioned2023-02-20T04:37:33Z-
dc.date.available2023-02-20T04:37:33Z-
dc.date.issued2023-
dc.identifier.govdoc02079en_US
dc.identifier.urihttp://hdl.handle.net/11054/2099-
dc.description.abstractPurpose: Dual anti-HER2 targeted therapy and chemotherapy is the current first-line standard of care for HER2 + metastatic breast cancer (MBC), with endocrine therapy (ET) the backbone of treatment in hormone receptor positive (HR +) disease. The potential ET benefit in HER2 + /HR + patients is unknown as pivotal dual anti-HER2 clinical trials precluded ET use. Methods: Real-world data from a multi-site registry of consecutive HER2 + MBC patients treated at clinician discretion were examined. Patients that were HR + (ER + and/or PR +) and had received first-line chemotherapy alongside trastuzumab and pertuzumab were explored. Of 362 patients in the registry, 215 were excluded due to being HR- (n = 210) or not receiving chemotherapy (n = 5). Results: Of the 147 patients included, 91 (62%) received concurrent ET and 56 (38%) had not. Comparing the groups, there were no significant differences in age, performance status, metastatic sites, use of previous therapy and de novo metastatic disease. More patients with ER + PR + disease versus those with ER + PR- or ER-PR + received ET (73 vs 45%). The addition of ET was associated with significantly improved 5-year PFS (HR 0.58, CI 0.37-0.89, p = 0.014) and OS (HR 0.52, CI 0.31-0.90, p = 0.018), with no increase in adverse events noted. Conclusion: The addition of ET to first-line dual anti-HER2 therapy post chemotherapy in patients with HER2 + /HR + MBC was associated with major gains in PFS and OS with no safety concerns evident. Further studies of this combination are justified, along with studies of how best to integrate other agents that are active in this patient subset, including CDK4/6 inhibitors.en_US
dc.description.provenanceSubmitted by Gemma Siemensma (gemmas@bhs.org.au) on 2023-02-13T00:57:54Z No. of bitstreams: 0en
dc.description.provenanceApproved for entry into archive by Gemma Siemensma (gemmas@bhs.org.au) on 2023-02-20T04:37:33Z (GMT) No. of bitstreams: 0en
dc.description.provenanceMade available in DSpace on 2023-02-20T04:37:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2023en
dc.titleAddition of endocrine therapy to dual anti-HER2 targeted therapy in initial treatment of HER2 + /HR + metastatic breast cancer.en_US
dc.typeJournal Articleen_US
dc.type.specifiedArticleen_US
dc.bibliographicCitation.titleBreast Cancer Research and Treatmenten_US
dc.bibliographicCitation.volume198en_US
dc.bibliographicCitation.issue1en_US
dc.bibliographicCitation.stpage67en_US
dc.bibliographicCitation.endpage74en_US
dc.subject.healththesaurusMETASTATIC BREAST CANCERen_US
dc.subject.healththesaurusENDOCRINE THERAPYen_US
dc.subject.healththesaurusHER2en_US
dc.subject.healththesaurusHORMONE RECEPTOR-POSITIVEen_US
dc.identifier.doihttps://doi.org/0.1007/s10549-022-06856-1en_US
Appears in Collections:Research Output

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