Therapeutic Response Statement (Sensitivity)

This therapeutic response statement supports the relationship that ER negative, HER2-negative, PD-L1 (CPS) >= 10, PR negative status confers therapeutic sensitivity to Paclitaxel, Pembrolizumab in patients with Invasive Breast Carcinoma.

This statement is based on a regulatory approval from the Health Canada:

KEYTRUDA (pembrolizumab), in combination with chemotherapy, is indicated for the treatment of adult patients with locally recurrent unresectable or metastatic triple-negative breast cancer (TNBC), who have not received prior chemotherapy for metastatic disease and whose tumours express PD-L1 (Combined Positive Score [CPS] ≥ 10) as determined by a validated test.

Citation

Merck Canada Inc. Keytruda (pembrolizumab) [product monograph]. Health Canada website. https://pdf.hres.ca/dpd_pm/00080285.PDF. Published April 2025. Accessed June 2025.