HER2+ Breast Cancer

Nusayba Bagegni, MD, details ongoing research and possibilities for the treatment landscape in the future, which includes investigating escalating approaches through more research in clinical trials.

The FDA has issued a complete response letter to the biologics license application for vic-trastuzumab duocarmazine for the treatment of patients with HER2-positive unresectable, locally advanced or metastatic breast cancer.

Preoperative treatment with atezolizumab, epirubicin, trastuzumab, and pertuzumab led to improved rates of pathologic complete response and decreased residual cancer burden compared with trastuzumab, pertuzumab, and chemotherapy alone in patients with early-stage HER2-positive breast cancer, according to findings from the randomized phase 2 ATHENE trial.

Patient-reported outcomes with fam-trastuzumab deruxtecan-nxki in HER2-positive metastatic breast cancer reflected the regimen’s favorable risk-benefit profile in the phase 3 DESTINY-Breast02 trial, according to findings presented during the 2023 ESMO Breast Cancer Annual Congress.

Treatment with trastuzumab deruxtecan resulted in lower exposure-adjusted incidence rates per patient-year of treatment-emergent adverse effects compared with treatment of physician’s choice in patients with HER2-low unresectable and/or metastatic breast cancer, according to safety analysis from the phase 3 DESTINY-Breast04 trial.

Neelam Desai, MD, discusses the toxicity profile of fam-trastuzumab deruxtecan-nxki in HER2-positive breast cancer.

Nusayba Bagegni, MD, discusses the prevalence of interstitial lung disease in patients with HER2-positive breast cancer treated with trastuzumab deruxtecan.

Nusayba Bagegni, MD, discusses updated efficacy and biomarker data from the phase 2 APT and ATEMPT trials in early-stage HER2-positive breast cancer.

Stephanie L. Graff, MD, discusses the evaluation of trastuzumab deruxtecan in patients with HER2-zero metastatic breast cancer in the ongoing, phase 2 DESTINY-Breast06 trial.

The Scottish Medicines Consortium has accepted fam-trastuzumab deruxtecan-nxki as a treatment option for adult patients with HER2-positive unresectable or metastatic breast cancer who have received 1 prior anti–HER2-based therapy.

Joyce A. O’Shaughnessy, MD, discusses real-world data for the use of the phase 2 HER2CLIMB trial regimen of tucatinib plus trastuzumab and capecitabine in HER2-positive breast cancer.

Cynthia X. Ma, MD, PhD, discusses updates in triple-negative breast cancer treatment, recent data on HER2-targeted agents in metastatic and early-stage HER2-positive breast cancer, and the role of CDK4/6 inhibitors and oral selective estrogen receptor degraders in hormone receptor–positive disease.

Jennifer M. Matro, MD, discusses the real-world implications and uptake of the HER2CLIMB regimen, other trials investigating tucatinib-based regimens in HER2-positive metastatic breast cancer, and how approaches differ between early-stage and metastatic hormone receptor–positive/HER2-negative breast cancer.

Mary Anne Fenton, MD, discusses findings from the phase 3 DESTINY-Breast03 trial in patients with metastatic, HER2-positive breast cancer.

Stephanie L. Graff, MD, discusses data from an exploratory analysis of patients with HER2-positive breast cancer and brain metastases enrolled to the phase 2 HER2CLIMB study, and emphasizes the need for such research efforts to move the needle forward for this population.

The FDA has accepted a biologics license application for the HLX02, a proposed trastuzumab biosimilar, as adjuvant therapy for patients with HER2-overexpressing breast cancer, HER2-overexpressing metastatic breast cancer, and HER2-overexpressing metastatic gastric or gastroesophageal junction adenocarcinoma

The first-line standard of care for patients with HER2-postive metastatic breast cancer has long been held by the combination of pertuzumab, trastuzumab, and a taxane established with the publication of data from the CLEOPATRA trial.

Lisa M. Carey, MD, ScM, FASCO, discusses upcoming treatments that could impact standard-of-care practices and the continually evolving role of antibody-drug conjugates role in the breast cancer treatment paradigm.

With the advent of effective drug regimens to treat HER2-positive breast cancer, the use of tailored efforts with neoadjuvant therapy in this space may continue to improve efficacy moving forward.

The advent of antibody-drug conjugates has placed a renewed focus on the lesser thought of HER2 classifications of IHC 1+ and 0.

The antibody-drug conjugate ARX788 was found to significantly improve progression-free survival compared with an active control in patients with HER2-positive locally advanced or metastatic breast cancer.

The National Medical Products Administration of China has approved the use of single-agent fam-trastuzumab deruxtecan-nxki in adult patients with unresectable or metastatic HER2-positive breast cancer who previously received 1 or more anti–HER2-based regimens.

Jasmine Sukumar, MD, discusses the purpose of analyzing endocrine therapy use in HR-positive/HER2-positive patients, key data presented from the retrospective analysis at SABCS, and the need for improved understanding of clinical indications for endocrine therapy in this breast cancer subtype.

As targeted agents for various levels of HER2 expression have demonstrated dynamic interoperability and efficacy, the prognosis for HER2-positive disease has improved.

John Crown, MB, BCh, BAO, BSc, MD, MBA, discusses the rationale for evaluating lapatinib (Tykerb) with standard trastuzumab/chemotherapy regimen in patients with HER2-positive breast cancer, as well as contextualizes results from a phase 2 trial.