1. Pathological and clinical outcomes following neoadjuvant dual HER2 therapy for early-stage breast cancer: An Australian institutional real-world experience.
- Author
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Narayanan S, Ngui NK, Kinchington B, Choi JDW, Hughes TMD, Rutovitz J, Hasovits C, Nahar KJ, Edirimanne S, and Marx G
- Subjects
- Humans, Female, Middle Aged, Retrospective Studies, Adult, Aged, Australia, Neoplasm Staging, Treatment Outcome, Trastuzumab therapeutic use, Trastuzumab administration & dosage, Taxoids administration & dosage, Taxoids therapeutic use, Bridged-Ring Compounds therapeutic use, Bridged-Ring Compounds administration & dosage, Antibodies, Monoclonal, Humanized therapeutic use, Antibodies, Monoclonal, Humanized administration & dosage, Chemotherapy, Adjuvant methods, Breast Neoplasms drug therapy, Breast Neoplasms pathology, Breast Neoplasms mortality, Breast Neoplasms metabolism, Neoadjuvant Therapy methods, Receptor, ErbB-2 metabolism, Antineoplastic Combined Chemotherapy Protocols therapeutic use
- Abstract
Aim: There has been significant progress made in developing novel targeted therapies in the neoadjuvant setting for non-metastatic HER2-positive breast cancer, which may be used in combination with conventional chemotherapy to optimise pathological responses at surgery. However, these therapies, particularly the chemotherapeutic components, may portend significant and long-lasting toxicity. Hence, de-escalation of treatment intensity has been an area of interest and was evaluated in the phase II NeoSphere study. Herein, we report the real-world pathological and survival outcomes from neoadjuvant taxane and dual HER2 blockade recorded at our centre., Methods: This was a retrospective cohort study of patients receiving neoadjuvant pertuzumab, trastuzumab and taxane chemotherapy for non-metastatic HER2-positive breast cancer at a single centre in Sydney, Australia. We collected data pertaining to baseline demographic characteristics, pathological response rates, post-surgical prescribing patterns and also undertook survival analyses for invasive disease-free survival (iDFS) as well as exploratory analyses for correlations between pre-specified clinicopathologic factors and pathological response at surgery., Results: Our population was largely similar at baseline to the NeoSphere study. 71 patients were included in the final analysis. 61% achieved a pathological complete response (pCR). Three patients received conventional chemotherapy in the adjuvant setting. 92% of included patients were alive and disease-free at 3 years of follow-up. Only 3 events of recurrence or death were recorded at a median follow-up of 32 months. No significant difference in iDFS was noted between patients achieving pCR and those with residual disease at surgery., Conclusion: This study demonstrates that de-escalated adjuvant treatment for HER2-positive early breast cancer achieved favourable pathological and long-term outcomes comparable to large trials, some utilising more intensive chemotherapeutic components., (© 2024 The Author(s). Cancer Medicine published by John Wiley & Sons Ltd.)
- Published
- 2024
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