Pathological Complete Response and Safety of Neoadjuvant Pembrolizumab-Based Chemoimmunotherapy in Triple-Negative and Hormone Receptor-Low Breast Cancer: A Real-World Cohort Study
Background Neoadjuvant pembrolizumab-based chemoimmunotherapy is standard of care for early-stage triple-negative breast cancer (TNBC). Real-world data remain limited outside trial populations, particularly in the Middle East, and hormone receptor (HR)-low tumors (ER/PR 1–10%) are undercharacterised in this setting. Me...