Regulatory approval

Published by the Food and Drug Administration.

The U.S. Food and Drug Administration granted approval to pembrolizumab for the treatment of adult and pediatric patients with unresectable or metastatic microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) solid tumors, as determined by an FDA approved test, that have progressed following prior treatment and who have no satisfactory alternative treatment options.

This is written in the approval document as:

KEYTRUDA is a programmed death receptor-1 (PD-1)-blocking antibody indicated for the treatment of adult and pediatric patients with unresectable or metastatic microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) solid tumors, as determined by an FDA approved test, that have progressed following prior treatment and who have no satisfactory alternative treatment options.

Citation

Merck Sharp & Dohme Corp. Keytruda (pembrolizumab) [package insert]. U.S. Food and Drug Administration website. https://www.accessdata.fda.gov/drugsatfda_docs/label/2025/125514s174lbl.pdf. Revised April 2025. Accessed April 30, 2025.

Therapeutic response

Precision oncology relationships for therapeutic response derived from this regulatory approval.

Type	Biomarker(s)	Cancer type	Therapy(ies)
Sensitivity (+)	dMMR	Any solid tumor	Pembrolizumab
Sensitivity (+)	MSI-H	Any solid tumor	Pembrolizumab