HNSCCPhase 2NCT03082534
Pembrolizumab Combined With Cetuximab for Treatment of Recurrent/Metastatic Head & Neck Squamous Cell Carcinoma
A Phase 2 study testing Pembrolizumab, Cetuximab in people with HNSCC and Lip SCC, run by University of California, San Diego at 4 sites in United States.
Trial summary
This is a prospective, multi-center, open-label, non-randomized, multi-arm phase II trial to evaluate the efficacy of combination therapy with pembrolizumab and cetuximab for patients with recurrent/metastatic HNSCC. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- HNSCC, Lip SCC, Oral Cavity Cancer
- What is being tested?
- Pembrolizumab, Cetuximab
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 78 participants
- Where
- 4 sitesUnited States
- Study dates
- 28 Mar 2017to 11 Sep 2025
- Phase
- Phase 2
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patients must meet all of the inclusion criteria to participate in this study.
- Ability to understand and the willingness to sign a written informed consent.
- Histologically or cytologically proven squamous cell carcinoma of the head and neck (lip, oral cavity, oropharynx, larynx, hypopharynx, non-EBV related nasopharynx, sinonasal, cutaneous), not amenable to curative intent therapy.
- Platinum-refractory disease, or ineligible/unfit for platinum-based therapy
- Patients must have at least one measurable site of disease as defined by RECIST v.1.1, determined by investigator review
- Age ≥ 18 years.
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- Eastern Cooperative Oncology Group (ECOG) Performance status 0 or 1.
- Patient has adequate hematologic, hepatic and renal function
- Female patient of childbearing potential has a negative serum or urine pregnancy within 72 hours prior to receiving the first dose of study medication.
- Female patient of childbearing potential agrees to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study through 120 days after the last dose of study medication.
- Male patient with a partner of childbearing potential agrees to use an adequate method of contraception starting with the first dose of study therapy through 120 days after the last dose of study therapy.
- Additional Inclusion Criterion for Cohort 1 (PD-1/PD-L1 Inhibitor-naïve, Cetuximab-naïve) and Cohort 2 (PD-1/PD-L1 Inhibitor-refractory, Cetuximab-naïve):
- 1. Cetuximab-naïve patients may not have received cetuximab therapy in the recurrent/metastatic setting (treatment in curative setting permitted)
- Additional Inclusion Criterion for Cohorts 2 and 3 (PD-1/PD-L1 Inhibitor-refractory):
- 1. PD-1/PD-L1 inhibitor-refractory patients must have documented disease progression after prior response to anti-PD-1/PD-L1 therapy (response defined as stable disease, partial or complete response)
- Additional Inclusion Criterion for Cohort 4 (Cutaneous HNSCC):
- 1. Cutaneous HNSCC must not be amenable to local treatment modalities, including surgery and/or radiation.
Who cannot join
- Patients meeting any of the exclusion criteria at baseline will be excluded from study participation.
- Patient has salivary gland primary.
- Patient is currently receiving or has received another investigational agent within 4 weeks prior to Day 1 of study.
- Patient has received chemotherapy or radiotherapy within 4 weeks prior to Day 1 of study. Prior palliative radiotherapy to metastatic lesion(s) is permitted, provided there is at least one measurable lesion that has not been radiated.
- Patient has received a prior anti-cancer monoclonal antibody (mAb) within 4 weeks prior to study Day 1 or who has not recovered (i.e., ≤ Grade 1 or baseline) from adverse events due to a previously administered agents.
- Patient has had major surgery or insufficient recovery from surgical-related trauma or wound healing within 14 days of Study Day 1.
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- Patient has had a prior Grade ≥ 3 immune-related adverse event (irAE) while receiving any previous immunotherapy agent, or any unresolved irAE > Grade 1.
- Patient has had prior Grade 4 infusion reaction to cetuximab.
- Patient has a known additional malignancy that is progressing or requires active treatment. Exceptions include basal cell carcinoma of the skin or squamous cell carcinoma of the skin that has undergone potentially curative therapy or in situ cervical cancer.
- Patient has known active central nervous system (CNS) metastases and/or carcinomatous meningitis.
- Note: Patients with previously treated brain metastases may participate provided they are stable (without evidence of progression by imaging for at least four weeks prior to the first dose of trial treatment and any neurologic symptoms have returned to baseline), have no evidence of new or enlarging brain metastases, and are not using steroids for at least 7 days prior to trial treatment. This exception does not include carcinomatous meningitis which is excluded regardless of clinical stability.
- Patient has an active autoimmune disease that has required systemic treatment in the past 2 years (i.e. with use of disease modifying agents, corticosteroids or immunosuppressive drugs).
- Notes:
- Patients with vitiligo, Grave's disease, or psoriasis not requiring systemic treatment within the past 2 years are not excluded.
- Replacement therapy (e.g., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment.
- Patient has a diagnosis of immunodeficiency or is receiving systemic steroid therapy (>10mg prednisone daily, or steroid equivalent) or any other form of immunosuppressive therapy within 7 days prior to the first dose of pembrolizumab.
- Patient has a known history of active TB (Baccillus Tuberculosis).
- Patient has a known history of, or any evidence of active, non-infectious pneumonitis.
- Patient has a known history of chronic interstitial lung disease.
- Patient has an active infection requiring systemic therapy.
- Patient has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the subject's participation for the full duration of the trial, or is not in the best interest of the subject to participate, in the opinion of the treating investigator.
- Patient has a known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial.
- Patient is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the trial.
- Patient has known active Hepatitis B infection (defined as presence of HepB sAg and/ or Hep B DNA), active hepatitis C infection (defined as presence of Hep C RNA) and/or known Human Immunodeficiency Virus (HIV) carrier (HIV 1/2 antibodies).
- Patient has received a live vaccine within 30 days of study Day 1.
- Note: Seasonal influenza vaccines for injection are generally inactivated flu vaccines and are allowed; however intranasal influenza vaccines (e.g., Flu-Mist®) are live attenuated vaccines, and are not allowed.
- Additional Exclusion Criterion for Cohorts 1 (PD-1/PD-L1 inhibitor-naïve, cetuximab-naïve) and 4 (cutaneous):
- 1. Patient has received any prior immunotherapy with inhibitors of PD-1 or PD-L1.
Trial locations and contacts
4 sites in 1 country.
United States4 sites
University of Michigan Cancer Center
Ann Arbor, Michigan, 48109
UCSD Moores Cancer Center
La Jolla, California, 92093
University of California Los Angeles Cancer Center
Los Angeles, California, 90095
Washington School of Medicine Cancer Center
St Louis, Missouri, 63110
About this study
Official title: An Open-label, Non-randomized, Multi-arm, Phase II Trial to Evaluate the Efficacy of Pembrolizumab Combined With Cetuximab in Patients With Recurrent/Metastatic Head and Neck Squamous Cell Carcinoma (HNSCC)
This is a prospective, multi-center, open-label, non-randomized, multi-arm phase II trial to evaluate the efficacy of combination therapy with pembrolizumab and cetuximab for patients with recurrent/metastatic HNSCC. There will be four patient cohorts, including a PD-1/PD-L1 inhibitor-naïve, cetuximab-naïve arm (Cohort 1), a PD-1/PD-L1 inhibitor-refractory, cetuximab-naïve arm (Cohort 2), a PD-1/PD-L1 inhibitor-refractory, cetuximab-refractory arm (Cohort 3), and a cutaneous HNSCC arm (Cohort 4). A total of 83 patients (33 in Cohort 1, 25 in Cohort 2, 15 in Cohort 3, and 10 in Cohort 4) will be eligible to enroll. Patients will be enrolled at 4 sites: UC San Diego Moores Cancer Center, UC Los Angeles Jonsson Comprehensive Cancer Center, University of Michigan Comprehensive Cancer Center, and University of Washington Siteman Cancer Center.
Read the detailed description
Primary Objectives:
To determine the clinical efficacy of pembrolizumab combined with cetuximab for patients with R/M HNSCC.
- Cohort 1 (PD-1/PD-L1 inhibitor-naïve, cetuximab-naïve): clinical efficacy defined as overall response rate.
- Cohort 2 (PD-1/PD-L1 inhibitor-refractory, cetuximab-naïve): clinical efficacy defined as overall response rate.
- Cohort 3 (PD-1/PD-L1 inhibitor-refractory, cetuximab-refractory): clinical efficacy defined as overall response rate.
- Cohort 4 (cutaneous HNSCC): clinical efficacy defined as overall response rate.
Secondary Objectives:
- To determine 12 month progression-free survival probability.
- To determine overall survival.
- To determine duration of response.
- To assess safety and tolerability of pembrolizumab combined with cetuximab.
- To evaluate the correlation between molecular markers and disease outcome.
- Conditions
- HNSCC, Lip SCC, Oral Cavity Cancer, Oropharynx Cancer, Larynx Cancer, Hypopharynx Cancer
- Being tested
- Pembrolizumab, Cetuximab
- Keywords
- Head and Neck Cancer, Pembrolizumab, Keytruda®, Cetuximab, Erbitux®, Recurrent, Metastatic, PD-1, PD-L1, non-EBV related Nasopharynx
- Medical subject headings
- Squamous Cell Carcinoma of Head and Neck, Mouth Neoplasms, Oropharyngeal Neoplasms, Laryngeal Neoplasms, Hypopharyngeal Neoplasms, Nasopharyngeal Neoplasms, Head and Neck Neoplasms, Recurrence
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Pembrolizumab, CetuximabDrug
Also called Keytruda®, Erbitux®
Pembrolizumab (KEYTRUDA®; MK-3475) is a potent and highly selective humanized monoclonal antibody (mAb) of the immunoglobulin G4 (IgG4)/kappa isotype designed to directly block the interaction between PD-1 and its ligands, programmed cell death ligand 1 (PD-L1) and programmed cell death ligand 2 (PD-L2). This blockade enhances functional activity of the target lymphocytes to facilitate tumor regression and ultimately immune rejection.
Cetuximab (Erbitux®) binds specifically to the epidermal growth factor receptor (EGFR) on both normal and tumor cells, and competitively inhibits the binding of EGF and other ligands, such as transforming growth factor-alpha. Cetuximab can mediate antibody-dependent cellular cytotoxicity (ADCC), with in vitro assays and in vivo animal studies demonstrating that cetuximab inhibits the growth and survival of tumor cells expressing EGFR.
| Study group | Role | What they receive |
|---|---|---|
| Cohort 1 | Experimental | PD-1/PD-L1 inhibitor-naïve, cetuximab-naïve
Pembrolizumab (Keytruda®):
Pembrolizumab is administered on an outpatient basis. 200 mg pembrolizumab will be administered as a 30 minute (-5 min/+10 min) intravenous (IV) infusion every 3 weeks.
Cetuximab (Erbitux®):
The initial cetuximab dose of 400mg/m2 is administered on Cycle 1, Day 1 as a 120-minute IV infusion (maximum infusion rate 10mg/min).1 Subsequent weekly cetuximab doses of 250mg/m2 are administered as 60-minute IV infusions (maximum infusion rate 10mg/min). Receives: Drug: Pembrolizumab, Cetuximab |
| Cohort 2 | Experimental | PD-1/PD-L1 inhibitor-refractory, cetuximab-naïve
Pembrolizumab (Keytruda®):
Pembrolizumab is administered on an outpatient basis. 200 mg pembrolizumab will be administered as a 30 minute (-5 min/+10 min) intravenous (IV) infusion every 3 weeks.
Cetuximab (Erbitux®):
The initial cetuximab dose of 400mg/m2 is administered on Cycle 1, Day 1 as a 120-minute IV infusion (maximum infusion rate 10mg/min).1 Subsequent weekly cetuximab doses of 250mg/m2 are administered as 60-minute IV infusions (maximum infusion rate 10mg/min). Receives: Drug: Pembrolizumab, Cetuximab |
| Cohort 3 | Experimental | PD-1/PD-L1 inhibitor-refractory, cetuximab-refractory
Pembrolizumab (Keytruda®):
Pembrolizumab is administered on an outpatient basis. 200 mg pembrolizumab will be administered as a 30 minute (-5 min/+10 min) intravenous (IV) infusion every 3 weeks.
Cetuximab (Erbitux®):
The initial cetuximab dose of 400mg/m2 is administered on Cycle 1, Day 1 as a 120-minute IV infusion (maximum infusion rate 10mg/min).1 Subsequent weekly cetuximab doses of 250mg/m2 are administered as 60-minute IV infusions (maximum infusion rate 10mg/min). Receives: Drug: Pembrolizumab, Cetuximab |
| Cohort 4 | Experimental | cutaneous HNSCC
Pembrolizumab (Keytruda®):
Pembrolizumab is administered on an outpatient basis. 200 mg pembrolizumab will be administered as a 30 minute (-5 min/+10 min) intravenous (IV) infusion every 3 weeks.
Cetuximab (Erbitux®):
The initial cetuximab dose of 400mg/m2 is administered on Cycle 1, Day 1 as a 120-minute IV infusion (maximum infusion rate 10mg/min).1 Subsequent weekly cetuximab doses of 250mg/m2 are administered as 60-minute IV infusions (maximum infusion rate 10mg/min). Receives: Drug: Pembrolizumab, Cetuximab |
What is being measured
The primary outcome is the main question the study is designed to answer.
Overall Response Rate
Proportion of patients with partial or complete response in tumor burden as defined by RECIST
Measured: 6 months from the time of study enrollment
Secondary outcomes (8)
Progression Free Survival
No disease progression or death from any cause at 12 months from the time of study enrollment
Measured: 12 months from the time of study enrollment
Overall Survival
Time from study enrollment to death from any cause
Measured: From the time of study enrollment until the date of death from any cause or completion of study, whichever came first, assessed up to 36 months
Duration of Response
Time from documentation of tumor response to disease progression
Measured: Every 9 weeks from first on-treatment scan until disease progression or patient withdrawal from study or date of death from any cause, whichever came first, assessed up to 36 months
Number of Patients With Grade 3 Through Grade 5 Adverse Events That Are Related to Pembrolizumab and Cetuximab, Graded According to NCI CTCAE v4.03
Description, grade (per CTCAE v4.03), seriousness and relatedness
Measured: Upon study enrollment, then subsequently at the first visit of each cycle (cycle length is 21 days), at the time of any adverse event, through end of treatment study visit, assessed up to 36 months
Correlative Analyses
Tumor tissue biomarkers correlated with outcome to pembrolizumab or cetuximab, such as PD-L1 expression, EGFR expression, p16 status, and immunophenotyping
Measured: Tumor specimens (archival or new specimen) should be obtained within 42 days of screening
Correlative Analyses
Blood biomarkers correlated with outcome to pembrolizumab or cetuximab, including T cell receptor (TCR) sequencing
Measured: Blood samples will be collected at screening, at time of first radiographic disease assessment on treatment (prior to initiation of cycle 4), and at time of clinical or radiographic disease progression, up to 36 months
Correlative Analyses
Blood biomarkers correlated with outcome to pembrolizumab or cetuximab, including Epstein-Barr virus plasma DNA titers
Measured: Blood samples will be collected at screening, at time of first radiographic disease assessment on treatment (prior to initiation of cycle 4), and at time of clinical or radiographic disease progression, up to 36 months
Correlative Analyses
Whole exome sequencing for neoantigen discovery
Measured: Newly obtained tumor specimen within 42 days of screening (when feasible)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Mar 2017
- Study start28 Mar 2017
- Primary completion21 Jul 2025
- Study completion11 Sep 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for HNSCCStudies of the same condition, open and under way.
- More trials run by University of California, San DiegoThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Model description
- Open-label, non-randomized, multi-arm phase II trial of pembrolizumab combined with cetuximab for patients with recurrent/metastatic head and neck squamous cell carcinoma 1. Cohort 1 (PD-1/PD-L1 inhibitor-naïve, cetuximab-naïve): clinical efficacy defined as overall response rate. 2. Cohort 2 (PD-1/PD-L1 inhibitor-refractory, cetuximab-naïve): clinical efficacy defined as overall response rate. 3. Cohort 3 (PD-1/PD-L1 inhibitor-refractory, cetuximab-refractory): clinical efficacy defined as overall response rate. 4. Cohort 4 (cutaneous HNSCC): clinical efficacy defined as overall response rate.
- Masking
- None (open label)
- Enrolment
- 78 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of California, San Diego
- Sponsor type
- University, hospital or other
- Collaborators
- Merck Sharp & Dohme LLC
- Responsible party
- Principal investigator, Assuntina G. Sacco, MD, University of California, San Diego
- Investigators
- Assuntina Sacco, M.D., Principal investigator, University of California, San Diego
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03082534
- Sponsor's protocol ID
- 160621
- Other IDs
- MISP 52211
- Status last verified
- Feb 2026
- First submitted
- 28 Feb 2017
- Last updated
- 1 Oct 2026
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Sacco AG, Chen R, Worden FP, Wong DJL, Adkins D, Swiecicki P, Chai-Ho W, Oppelt P, Ghosh D, Bykowski J, Molinolo A, Pittman E, Estrada MV, Gold K, Daniels G, Lippman SM, Natsuhara A, Messer K, Cohen EEW. Pembrolizumab plus cetuximab in patients with recurrent or metastatic head and neck squamous cell carcinoma: an open-label, multi-arm, non-randomised, multicentre, phase 2 trial. Lancet Oncol. 2021 Jun;22(6):883-892. doi: 10.1016/S1470-2045(21)00136-4. Epub 2021 May 11.
PubMed 33989559
Study at a glance
From the registry record, last updated by the sponsor on 1 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- An Open-label, Non-randomized, Multi-arm, Phase II Trial to Evaluate the Efficacy of Pembrolizumab Combined With Cetuximab in Patients With Recurrent/Metastatic Head and Neck Squamous Cell Carcinoma (HNSCC)
- ClinicalTrials.gov ID
- NCT03082534
- Acronym / sponsor ID
- 160621
- Conditions
- HNSCC, Lip SCC, Oral Cavity Cancer, Oropharynx Cancer, Larynx Cancer, Hypopharynx Cancer
- Keywords
- Head and Neck Cancer, Pembrolizumab, Keytruda®, Cetuximab, Erbitux®, Recurrent, Metastatic, PD-1
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 78 participants (actual)
- Lead sponsor
- University of California, San DiegoUniversity, hospital or other
- Collaborators
- Merck Sharp & Dohme LLC
- Study start
- 28 Mar 2017 (actual)
- Primary completion
- 21 Jul 2025 (actual)
- Study completion
- 11 Sep 2025 (actual)
- First posted
- 17 Mar 2017 (actual)
- Results
- Posted 1 Oct 2026
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a prospective, multi-center, open-label, non-randomized, multi-arm phase II trial to evaluate the efficacy of combination therapy with pembrolizumab and cetuximab for patients with recurrent/metastatic HNSCC. There will be four patient cohorts, including a PD-1/PD-L1 inhibitor-naïve, cetuximab-naïve arm (Cohort 1), a PD-1/PD-L1 inhibitor-refractory, cetuximab-naïve arm (Cohort 2), a PD-1/PD-L1 inhibitor-refractory, cetuximab-refractory arm (Cohort 3), and a cutaneous HNSCC arm (Cohort 4). A total of 83 patients (33 in Cohort 1, 25 in Cohort 2, 15 in Cohort 3, and 10 in Cohort 4) will be eligible to enroll. Patients will be enrolled at 4 sites: UC San Diego Moores Cancer Center, UC Los Angeles Jonsson Comprehensive Cancer Center, University of Michigan Comprehensive Cancer Center, and University of Washington Siteman Cancer Center.
Detailed description
Primary Objectives:
To determine the clinical efficacy of pembrolizumab combined with cetuximab for patients with R/M HNSCC.
- Cohort 1 (PD-1/PD-L1 inhibitor-naïve, cetuximab-naïve): clinical efficacy defined as overall response rate.
- Cohort 2 (PD-1/PD-L1 inhibitor-refractory, cetuximab-naïve): clinical efficacy defined as overall response rate.
- Cohort 3 (PD-1/PD-L1 inhibitor-refractory, cetuximab-refractory): clinical efficacy defined as overall response rate.
- Cohort 4 (cutaneous HNSCC): clinical efficacy defined as overall response rate.
Secondary Objectives:
- To determine 12 month progression-free survival probability.
- To determine overall survival.
- To determine duration of response.
- To assess safety and tolerability of pembrolizumab combined with cetuximab.
- To evaluate the correlation between molecular markers and disease outcome.
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 4
- Model description
- Open-label, non-randomized, multi-arm phase II trial of pembrolizumab combined with cetuximab for patients with recurrent/metastatic head and neck squamous cell carcinoma 1. Cohort 1 (PD-1/PD-L1 inhibitor-naïve, cetuximab-naïve): clinical efficacy defined as overall response rate. 2. Cohort 2 (PD-1/PD-L1 inhibitor-refractory, cetuximab-naïve): clinical efficacy defined as overall response rate. 3. Cohort 3 (PD-1/PD-L1 inhibitor-refractory, cetuximab-refractory): clinical efficacy defined as overall response rate. 4. Cohort 4 (cutaneous HNSCC): clinical efficacy defined as overall response rate.
| Arm | Type | Receives |
|---|---|---|
| Cohort 1 | Experimental | Drug: Pembrolizumab, CetuximabPD-1/PD-L1 inhibitor-naïve, cetuximab-naïve Pembrolizumab (Keytruda®): Pembrolizumab is administered on an outpatient basis. 200 mg pembrolizumab will be administered as a 30 minute (-5 min/+10 min) intravenous (IV) infusion every 3 weeks. Cetuximab (Erbitux®): The initial cetuximab dose of 400mg/m2 is administered on Cycle 1, Day 1 as a 120-minute IV infusion (maximum infusion rate 10mg/min).1 Subsequent weekly cetuximab doses of 250mg/m2 are administered as 60-minute IV infusions (maximum infusion rate 10mg/min). |
| Cohort 2 | Experimental | Drug: Pembrolizumab, CetuximabPD-1/PD-L1 inhibitor-refractory, cetuximab-naïve Pembrolizumab (Keytruda®): Pembrolizumab is administered on an outpatient basis. 200 mg pembrolizumab will be administered as a 30 minute (-5 min/+10 min) intravenous (IV) infusion every 3 weeks. Cetuximab (Erbitux®): The initial cetuximab dose of 400mg/m2 is administered on Cycle 1, Day 1 as a 120-minute IV infusion (maximum infusion rate 10mg/min).1 Subsequent weekly cetuximab doses of 250mg/m2 are administered as 60-minute IV infusions (maximum infusion rate 10mg/min). |
| Cohort 3 | Experimental | Drug: Pembrolizumab, CetuximabPD-1/PD-L1 inhibitor-refractory, cetuximab-refractory Pembrolizumab (Keytruda®): Pembrolizumab is administered on an outpatient basis. 200 mg pembrolizumab will be administered as a 30 minute (-5 min/+10 min) intravenous (IV) infusion every 3 weeks. Cetuximab (Erbitux®): The initial cetuximab dose of 400mg/m2 is administered on Cycle 1, Day 1 as a 120-minute IV infusion (maximum infusion rate 10mg/min).1 Subsequent weekly cetuximab doses of 250mg/m2 are administered as 60-minute IV infusions (maximum infusion rate 10mg/min). |
| Cohort 4 | Experimental | Drug: Pembrolizumab, Cetuximabcutaneous HNSCC Pembrolizumab (Keytruda®): Pembrolizumab is administered on an outpatient basis. 200 mg pembrolizumab will be administered as a 30 minute (-5 min/+10 min) intravenous (IV) infusion every 3 weeks. Cetuximab (Erbitux®): The initial cetuximab dose of 400mg/m2 is administered on Cycle 1, Day 1 as a 120-minute IV infusion (maximum infusion rate 10mg/min).1 Subsequent weekly cetuximab doses of 250mg/m2 are administered as 60-minute IV infusions (maximum infusion rate 10mg/min). |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (17 listed)
- Patients must meet all of the inclusion criteria to participate in this study.
- Ability to understand and the willingness to sign a written informed consent.
- Histologically or cytologically proven squamous cell carcinoma of the head and neck (lip, oral cavity, oropharynx, larynx, hypopharynx, non-EBV related nasopharynx, sinonasal, cutaneous), not amenable to curative intent therapy.
- Platinum-refractory disease, or ineligible/unfit for platinum-based therapy
- Patients must have at least one measurable site of disease as defined by RECIST v.1.1, determined by investigator review
Key exclusion criteria (28 listed)
- Patients meeting any of the exclusion criteria at baseline will be excluded from study participation.
- Patient has salivary gland primary.
- Patient is currently receiving or has received another investigational agent within 4 weeks prior to Day 1 of study.
- Patient has received chemotherapy or radiotherapy within 4 weeks prior to Day 1 of study. Prior palliative radiotherapy to metastatic lesion(s) is permitted, provided there is at least one measurable lesion that has not been radiated.
- Patient has received a prior anti-cancer monoclonal antibody (mAb) within 4 weeks prior to study Day 1 or who has not recovered (i.e., ≤ Grade 1 or baseline) from adverse events due to a previously administered agents.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Pembrolizumab, CetuximabAlso: Keytruda®, Erbitux®Pembrolizumab (KEYTRUDA®; MK-3475) is a potent and highly selective humanized monoclonal antibody (mAb) of the immunoglobulin G4 (IgG4)/kappa isotype designed to directly block the interaction between PD-1 and its ligands, programmed cell death ligand 1 (PD-L1) and programmed cell death ligand 2 (PD-L2). This blockade enhances functional activity of the target lymphocytes to facilitate tumor regression and ultimately immune rejection. Cetuximab (Erbitux®) binds specifically to the epidermal growth factor receptor (EGFR) on both normal and tumor cells, and competitively inhibits the binding of EGF and other ligands, such as transforming growth factor-alpha. Cetuximab can mediate antibody-dependent cellular cytotoxicity (ADCC), with in vitro assays and in vivo animal studies demonstrating that cetuximab inhibits the growth and survival of tumor cells expressing EGFR. | Drug | Cohort 1, Cohort 2, Cohort 3, Cohort 4 |
Primary outcome
Overall Response Rate
Time frame: 6 months from the time of study enrollment
Proportion of patients with partial or complete response in tumor burden as defined by RECIST
8 secondary outcomes
Progression Free Survival
Time frame: 12 months from the time of study enrollment
Overall Survival
Time frame: From the time of study enrollment until the date of death from any cause or completion of study, whichever came first, assessed up to 36 months
Duration of Response
Time frame: Every 9 weeks from first on-treatment scan until disease progression or patient withdrawal from study or date of death from any cause, whichever came first, assessed up to 36 months
Number of Patients With Grade 3 Through Grade 5 Adverse Events That Are Related to Pembrolizumab and Cetuximab, Graded According to NCI CTCAE v4.03
Time frame: Upon study enrollment, then subsequently at the first visit of each cycle (cycle length is 21 days), at the time of any adverse event, through end of treatment study visit, assessed up to 36 months
Correlative Analyses
Time frame: Tumor specimens (archival or new specimen) should be obtained within 42 days of screening
Correlative Analyses
Time frame: Blood samples will be collected at screening, at time of first radiographic disease assessment on treatment (prior to initiation of cycle 4), and at time of clinical or radiographic disease progression, up to 36 months
Correlative Analyses
Time frame: Blood samples will be collected at screening, at time of first radiographic disease assessment on treatment (prior to initiation of cycle 4), and at time of clinical or radiographic disease progression, up to 36 months
Correlative Analyses
Time frame: Newly obtained tumor specimen within 42 days of screening (when feasible)
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 1 Oct 2026.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Derived from this study: PubMed 33989559Sacco AG, Chen R, Worden FP, Wong DJL, Adkins D, Swiecicki P, Chai-Ho W, Oppelt P, Ghosh D, Bykowski J, Molinolo A, Pittman E, Estrada MV, Gold K, Daniels G, Lippman SM, Natsuhara A, Messer K, Cohen EEW. Pembrolizumab plus cetuximab in patients with recurrent or metastatic head and neck squamous cell carcinoma: an open-label, multi-arm, non-randomised, multicentre, phase 2 trial. Lancet Oncol. 2021 Jun;22(6):883-892. doi: 10.1016/S1470-2045(21)00136-4. Epub 2021 May 11.
- Individual participant dataSharing planned: No
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Proton Spatially Fractionated Radiotherapy or Photon Stereotactic Body Radiotherapy in Combination With Pembrolizumab Before Surgery for the Treatment of Locally Advanced and Radiation-Naive Locoregionally Recurrent Oral Cavity Cancer, OSPRI Trial
Locally Advanced Oral Cavity Squamous Cell Carcinoma, Locally Recurrent Oral Cavity Squamous Cell Carcinoma
RecruitingPhase 1/2
Docetaxel and SX-682 in Recurrent/Metastatic Head and Neck Squamous Cell Carcinoma, Salivary Gland Carcinoma, and Advanced Prostate Cancer
Head and Neck Cancer, Head and Neck Squamous Cell Carcinoma
RecruitingPhase 2
A Single Arm Phase II Trial in p16-positive Oropharynx Cancer of Selective Dose De-escalation of nodAl VolumEs at Minimal Risk and Primary Site Disease (SAVED)
Head and Neck Cancer, Head and Neck Squamous Cell Cancer
RecruitingPhase 3
Testing the Addition of Anti-Cancer Drug, Cetuximab, to Standard of Care Treatment (Pembrolizumab) for Returning or Spreading Head and Neck Cancer After Previous Treatment
Metastatic Head and Neck Squamous Cell Carcinoma, Metastatic Hypopharyngeal Squamous Cell Carcinoma
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Assuntina Sacco, M.D. principal investigator
University of California, San Diego
4 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Pembrolizumab, Cetuximab in people with HNSCC and Lip SCC, run by University of California, San Diego at 4 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 17 inclusion and 28 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 1 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 4 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 1 Oct 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Overall Response Rate (time frame: 6 months from the time of study enrollment). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT03082534, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 1 Oct 2026.