Key clinical point: A low expression of human epidermal growth factor receptor 2 (HER2) did not have any impact on survival outcomes in patients with metastatic t riple-negative breast cancer (TNBC).
Major finding: Patients with HER2-low and HER2-0 TNBC had similar overall survival rates (hazard ratio 0.95; P = .545).
Study details: Findings are from a retrospective, multicenter analysis including 691 patients with metastatic TNBC, of which 221 patients were classified as having HER2-low TNBC.
Disclosures: This study was supported by grants from Daiichi Sankyo, Pfizer, Novartis, AstraZeneca, Eli Lilly, Seagen, Roche, and from Ministero della Salture d'Italia. Some authors declared serving as speakers or on advisory boards or receiving honoraria, research grants, or travel grants from several sources, including Daiichi Sankyo, Pfizer, Novartis, Astra Zeneca, Eli Lilly, Seagen, Roche, and others.
Source: Gampenrieder SP et al. Influence of HER2 expression on prognosis in metastatic triple-negative breast cancer-results from an international, multicenter analysis coordinated by the AGMT Study Group. ESMO Open. 2022;8(1):100747 (Dec 21). Doi: 10.1016/j.esmoop.2022.100747