Regulatory approval

Published by the Health Canada.

Health Canada approved pembrolizumab, in combination with trastuzumab, fluoropyrimidine- and platinum-containing chemotherapy, for the first-line treatment of adult patients with locally advanced unresectable or metastatic HER2-positive gastric or gastroesophageal junction (GEJ) adenocarcinoma, whose tumours express PD-L1 (Combined Positive Score [CPS] ≥1) as determined by a validated test.

This is written in the approval document as:

KEYTRUDA (pembrolizumab), in combination with trastuzumab, fluoropyrimidine- and platinum-containing chemotherapy,is indicated for the first-line treatment of adult patients with locally advanced unresectable or metastatic HER2-positive gastric or gastroesophageal junction (GEJ) adenocarcinoma, whose tumours express PD-L1 (Combined Positive Score [CPS] ≥1) 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.

Therapeutic response

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

Type Biomarker(s) Cancer type Therapy(ies)
Sensitivity (+) HER2-positive, PD-L1 (CPS) >= 1 Adenocarcinoma of the Gastroesophageal Junction Cisplatin, Fluorouracil, Pembrolizumab, Trastuzumab