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T-DXd demonstrated a real-world overall response rate of 56.3%, median rwPFS of 7.4 months, and 12-month OS of 62% in patients with HER2-low metastatic breast cancer treated across US community oncology settings.

In a real-world cohort of 300 patients with HER2-low metastatic breast cancer, T-DXd demonstrated a safety profile consistent with DESTINY-Breast04 in community oncology settings, with ILD/pneumonitis in 10% and toxicity-related discontinuation in 15%.

ctDNA-based next-generation sequencing in 236 patients with advanced breast cancer revealed frequent PIK3CA, TP53, and ESR1 mutations, highlighting key mechanisms of endocrine resistance with implications for targeted therapy selection.

A dual-perspective survey of patients and physicians with metastatic breast cancer identified financial, logistical, and trust-related barriers to trial participation, with greater burden among racial and ethnic minorities.