• The APHINITY trial's 6-year analysis reveals that adjuvant pertuzumab with trastuzumab plus chemotherapy improved overall survival by 0.9% in HER2-positive early breast cancer patients, though not reaching statistical significance.
• Patients with node-positive disease showed the most significant benefit from the pertuzumab regimen, with a 4.5% absolute improvement in invasive disease-free survival at 6 years compared to placebo.
• The pertuzumab combination maintained a favorable cardiac safety profile with severe cardiac events occurring in less than 1% of patients, supporting its continued use in high-risk HER2-positive early breast cancer.