The Real-World Clinical Outcomes of Heavily Pretreated HER2+ and HER2-Low Metastatic Breast Cancer Patients Treated with Trastuzumab Deruxtecan at a Single Centre

Background: Trastuzumab deruxtecan (TDXd) is an antibody–drug conjugate that has demonstrated impressive activity in randomized controlled clinical trials in the context of patients with HER2-amplified and HER2-low metastatic breast cancer. We aimed to review the activity and adverse event profile o...

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Main Authors: Anna-Maria Lazaratos, Matthew Dankner, Aalya Hamouda, Soumaya Labidi, Victor Cohen, Lawrence Panasci, Jennifer E. Friedmann, François Patenaude, Cristiano Ferrario, Mark Basik, April A. N. Rose, Parvaneh Fallah
Format: Article
Language:English
Published: MDPI AG 2024-12-01
Series:Current Oncology
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Online Access:https://www.mdpi.com/1718-7729/32/1/1
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author Anna-Maria Lazaratos
Matthew Dankner
Aalya Hamouda
Soumaya Labidi
Victor Cohen
Lawrence Panasci
Jennifer E. Friedmann
François Patenaude
Cristiano Ferrario
Mark Basik
April A. N. Rose
Parvaneh Fallah
author_facet Anna-Maria Lazaratos
Matthew Dankner
Aalya Hamouda
Soumaya Labidi
Victor Cohen
Lawrence Panasci
Jennifer E. Friedmann
François Patenaude
Cristiano Ferrario
Mark Basik
April A. N. Rose
Parvaneh Fallah
author_sort Anna-Maria Lazaratos
collection DOAJ
description Background: Trastuzumab deruxtecan (TDXd) is an antibody–drug conjugate that has demonstrated impressive activity in randomized controlled clinical trials in the context of patients with HER2-amplified and HER2-low metastatic breast cancer. We aimed to review the activity and adverse event profile of TDXd in heavily pretreated breast cancer patients in real practice. Methods: We describe a single-center retrospective case series of metastatic breast cancer patients who were treated with TDXd. The outcomes of interest were the overall response rate, overall survival, progression-free survival and grade 4–5 adverse events. Objective responses and PFS were assessed in accordance with RECIST 1.1 criteria. Results: We identified 38 patients treated with TDXd. Of these, 15 patients had classically defined HER2-positive (HER2+) breast cancer, 4 of whom had active central nervous system (CNS) metastases. A total of 23 patients had HER2-low breast cancer, 2 of whom had active CNS disease. Of the 33 patients evaluable for response, 21 (63%) patients had a response to treatment, including three (9%) complete responses. Outcomes were similar between patients with a HER2+ and HER2-low status, as well as in patients with or without CNS metastases. No patients experienced grade 4 or 5 toxicities, and four of thirty-eight patients (10.5%) experienced pneumonitis (two patients with grade 3 pneumonitis, one patient with grade 2 and one patient with grade 1), resulting in TDXd discontinuation for three patients (with steroid administration in two patients). Conclusions: TDXd demonstrates impressive activity with manageable adverse event profiles in this heavily pretreated population that includes patients with active CNS metastases.
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spelling doaj-art-748a8bc97bed4d90bba26b2333ebb7d12025-01-24T13:28:19ZengMDPI AGCurrent Oncology1198-00521718-77292024-12-01321110.3390/curroncol32010001The Real-World Clinical Outcomes of Heavily Pretreated HER2+ and HER2-Low Metastatic Breast Cancer Patients Treated with Trastuzumab Deruxtecan at a Single CentreAnna-Maria Lazaratos0Matthew Dankner1Aalya Hamouda2Soumaya Labidi3Victor Cohen4Lawrence Panasci5Jennifer E. Friedmann6François Patenaude7Cristiano Ferrario8Mark Basik9April A. N. Rose10Parvaneh Fallah11Rosalind and Morris Goodman Cancer Institute, Montreal, QC H3A 1A3, CanadaRosalind and Morris Goodman Cancer Institute, Montreal, QC H3A 1A3, CanadaFaculty of Medicine, McGill University, Montreal, QC H3G 2M1, CanadaJewish General Hospital, Montreal, QC H3T 1E2, CanadaJewish General Hospital, Montreal, QC H3T 1E2, CanadaJewish General Hospital, Montreal, QC H3T 1E2, CanadaJewish General Hospital, Montreal, QC H3T 1E2, CanadaJewish General Hospital, Montreal, QC H3T 1E2, CanadaJewish General Hospital, Montreal, QC H3T 1E2, CanadaJewish General Hospital, Montreal, QC H3T 1E2, CanadaJewish General Hospital, Montreal, QC H3T 1E2, CanadaJewish General Hospital, Montreal, QC H3T 1E2, CanadaBackground: Trastuzumab deruxtecan (TDXd) is an antibody–drug conjugate that has demonstrated impressive activity in randomized controlled clinical trials in the context of patients with HER2-amplified and HER2-low metastatic breast cancer. We aimed to review the activity and adverse event profile of TDXd in heavily pretreated breast cancer patients in real practice. Methods: We describe a single-center retrospective case series of metastatic breast cancer patients who were treated with TDXd. The outcomes of interest were the overall response rate, overall survival, progression-free survival and grade 4–5 adverse events. Objective responses and PFS were assessed in accordance with RECIST 1.1 criteria. Results: We identified 38 patients treated with TDXd. Of these, 15 patients had classically defined HER2-positive (HER2+) breast cancer, 4 of whom had active central nervous system (CNS) metastases. A total of 23 patients had HER2-low breast cancer, 2 of whom had active CNS disease. Of the 33 patients evaluable for response, 21 (63%) patients had a response to treatment, including three (9%) complete responses. Outcomes were similar between patients with a HER2+ and HER2-low status, as well as in patients with or without CNS metastases. No patients experienced grade 4 or 5 toxicities, and four of thirty-eight patients (10.5%) experienced pneumonitis (two patients with grade 3 pneumonitis, one patient with grade 2 and one patient with grade 1), resulting in TDXd discontinuation for three patients (with steroid administration in two patients). Conclusions: TDXd demonstrates impressive activity with manageable adverse event profiles in this heavily pretreated population that includes patients with active CNS metastases.https://www.mdpi.com/1718-7729/32/1/1trastuzumabderuxtecanTDXdantibody–drug conjugatebreast cancer
spellingShingle Anna-Maria Lazaratos
Matthew Dankner
Aalya Hamouda
Soumaya Labidi
Victor Cohen
Lawrence Panasci
Jennifer E. Friedmann
François Patenaude
Cristiano Ferrario
Mark Basik
April A. N. Rose
Parvaneh Fallah
The Real-World Clinical Outcomes of Heavily Pretreated HER2+ and HER2-Low Metastatic Breast Cancer Patients Treated with Trastuzumab Deruxtecan at a Single Centre
Current Oncology
trastuzumab
deruxtecan
TDXd
antibody–drug conjugate
breast cancer
title The Real-World Clinical Outcomes of Heavily Pretreated HER2+ and HER2-Low Metastatic Breast Cancer Patients Treated with Trastuzumab Deruxtecan at a Single Centre
title_full The Real-World Clinical Outcomes of Heavily Pretreated HER2+ and HER2-Low Metastatic Breast Cancer Patients Treated with Trastuzumab Deruxtecan at a Single Centre
title_fullStr The Real-World Clinical Outcomes of Heavily Pretreated HER2+ and HER2-Low Metastatic Breast Cancer Patients Treated with Trastuzumab Deruxtecan at a Single Centre
title_full_unstemmed The Real-World Clinical Outcomes of Heavily Pretreated HER2+ and HER2-Low Metastatic Breast Cancer Patients Treated with Trastuzumab Deruxtecan at a Single Centre
title_short The Real-World Clinical Outcomes of Heavily Pretreated HER2+ and HER2-Low Metastatic Breast Cancer Patients Treated with Trastuzumab Deruxtecan at a Single Centre
title_sort real world clinical outcomes of heavily pretreated her2 and her2 low metastatic breast cancer patients treated with trastuzumab deruxtecan at a single centre
topic trastuzumab
deruxtecan
TDXd
antibody–drug conjugate
breast cancer
url https://www.mdpi.com/1718-7729/32/1/1
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