10/09/2026
How did one major trial change the treatment approach for high-risk early triple-negative breast cancer (TNBC)?🤷♀️
The KEYNOTE-522 trial looked at adding the immunotherapy drug pembrolizumab to chemotherapy for people with previously untreated, high-risk stage II–III TNBC💊
🔹 Before surgery: Pembrolizumab + chemotherapy
🔹 After surgery: Pembrolizumab continued alone for up to 9 cycles
🔹 PD-L1 status: Patients were included regardless of PD-L1 expression
At 5 years:
📈 86.6% of people receiving pembrolizumab + chemotherapy were alive, compared with 81.7% receiving chemotherapy alone.
The takeaway? Adding pembrolizumab improved 5-year overall survival in KEYNOTE-522, helping establish pembrolizumab + chemotherapy as an important treatment approach for high-risk early TNBC💜