About this trial
This is a Phase 3 randomized, open-label study to evaluate the efficacy and safety of petosemtamab plus pembrolizumab vs pembrolizumab in first-line treatment of recurrent or metastatic PD-L1+ head and neck squamous cell carcinoma.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Signed ICF before initiation of any study procedures
Age ≥ 18 years at signing of ICF
Histologically confirmed HNSCC with evidence of metastatic or locally recurrent disease not amenable to local therapy with curative intent.
The eligible HNSCC primary tumor locations are oropharynx, oral cavity, hypopharynx, and larynx.
Disqualifiers
Central nervous system metastases that are untreated or already treated but symptomatic, or require radiation, surgery, or continued steroid therapy to control symptoms within 21 days prior to randomization
Known leptomeningeal involvement
Any systemic anticancer therapy or investigational drug within 4 weeks or 5 half-lives, whichever is shorter, before randomization
Requirement for immunosuppressive medication
Trial design
Parallel
Treatments tested in this trial
Petosemtamab
DrugMCLA-158
Pembrolizumab
DrugHumanized Antibody
Treatment groups
Trial outcomes
Primary outcomes
Overall Survival (OS)
Objective Response Rate (ORR) per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 as assessed by blinded independent central review (BICR)
Secondary outcomes
Progression Free Survival (PFS) per RECIST v1.1 as assessed by BICR
Duration of Response (DOR) per RECIST v1.1 as assessed by BICR
Clinical benefit rate per RECIST v1.1 as assessed by BICR
Time to response (TTR) per RECIST v1.1 as assessed by BICR