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Study of Pembrolizumab (MK-3475) in Adults With Recurrent/Metastatic Cutaneous Squamous Cell Carcinoma (cSCC) or Locally Advanced Unresectable cSCC (MK-3475-629/KEYNOTE-629)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT03284424
Recruitment Status : Active, not recruiting
First Posted : September 15, 2017
Results First Posted : November 19, 2021
Last Update Posted : February 27, 2023
Information provided by (Responsible Party):
Merck Sharp & Dohme LLC

Brief Summary:
The purpose of this study is to evaluate the safety and efficacy of pembrolizumab (MK-3475) in adult participants with recurrent or metastatic(R/M) cutaneous Squamous Cell Carcinoma (cSCC) or locally advanced (LA) unresectable cSCC that is not amenable to surgery and/or radiation and/or systemic therapies.

Condition or disease Intervention/treatment Phase
Squamous Cell Carcinoma Biological: Pembrolizumab Phase 2

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 159 participants
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Phase 2, Open-Label, Single Arm Study to Evaluate the Safety and Efficacy of Pembrolizumab in Participants With Recurrent or Metastatic Cutaneous Squamous Cell Carcinoma (R/M cSCC)
Actual Study Start Date : October 26, 2017
Actual Primary Completion Date : July 29, 2020
Estimated Study Completion Date : September 13, 2023

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: R/M cSCC cohort
Participants with R/M cSCC receive pembrolizumab 200 mg via intravenous (IV) infusion on Day 1 of each 3-week cycle for up to approximately 2 years.
Biological: Pembrolizumab
IV infusion
Other Names:
  • MK-3475

Experimental: LA cSCC cohort
Participants with LA cSCC receive pembrolizumab 200 mg via IV infusion on Day 1 of each 3-week cycle for up to approximately 2 years.
Biological: Pembrolizumab
IV infusion
Other Names:
  • MK-3475

Primary Outcome Measures :
  1. Objective Response Rate (ORR) [ Time Frame: Up to approximately 31.8 months (database cutoff date 29-Jul-2020) ]
    ORR was defined as the percentage of participants who have best response of Complete Response (CR: Disappearance of all target lesions) or Partial Response (PR: At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters) per Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1). ORR per RECIST 1.1 as assessed by blinded independent central review (BICR) is presented.

Secondary Outcome Measures :
  1. Duration of Response (DOR) [ Time Frame: Up to approximately 56 months ]
  2. Disease Control Rate (DCR) [ Time Frame: Up to approximately 56 months ]
  3. Progression-free Survival (PFS) [ Time Frame: Up to approximately 56 months ]
  4. Overall Survival (OS) [ Time Frame: Up to approximately 56 months ]
  5. Number of Participants Who Experienced One or More Adverse Events (AEs) [ Time Frame: Up to approximately 56 months ]
  6. Number of Participants Who Discontinued Study Treatment Due to an Adverse Event (AE) [ Time Frame: Up to approximately 56 months ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • R/M cSCC cohort only:
  • Has cSCC that is either metastatic defined as disseminated disease, and/or unresectable disease that is not curable by surgery or radiation.
  • Has histologically-confirmed cSCC as the primary site of malignancy (metastatic skin involvement from another primary cancer or from an unknown primary cancer is not permitted).
  • LA cSCC cohort only:
  • Must be ineligible for surgical resection.
  • Participants who received prior radiation therapy (RT) to index site or must be deemed to be not eligible for RT.
  • Participants who received prior systemic therapy for curative intent are eligible regardless of regimen.
  • R/M cSCC cohort only:
  • Has metastatic disease defined as disseminated disease distant to the initial/primary site of diagnosis, and/or must have locally recurrent disease that has been previously treated (with either surgery or radiotherapy), and is not amenable to either curative surgery or radiotherapy.
  • Has measurable disease based on RECIST 1.1 as assessed by the central imaging vendor.
  • Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 within 10 days prior to the start of study treatment.
  • Has adequate organ function.
  • Has a tissue sample adequate for programmed death-ligand 1 (PD-L1) testing as determined by central laboratory testing prior to study allocation.
  • Has a life expectancy >3 months.
  • Female participants of childbearing potential must agree to use an adequate method of contraception during the study treatment period and for at least 120 days after the last dose of study treatment.

Exclusion Criteria:

  • Has cSCC that can be cured with surgical resection, radiotherapy, or with a combination of surgery and radiotherapy.
  • Has any other histologic type of skin cancer other than invasive squamous cell carcinoma as the primary disease under study, e.g. basal cell carcinoma that has not been definitively treated with surgery or radiation, Bowen's disease, Merkel cell carcinoma (MCC), melanoma.
  • Has had any prior allogeneic solid organ or bone marrow transplantation.
  • Has received prior therapy with an anti-programmed death protein-1 (anti-PD-1), anti-programmed death-ligand 1 (anti-PD-L1), or anti-PD-L2 agent or with an agent directed to another stimulatory or co-inhibitory T cell receptor (e.g. cytotoxic T-lymphocyte associated protein 4 [CTLA-4], Tumor necrosis factor receptor superfamily, member 4 [OX-40], tumor necrosis factor receptor superfamily member 9 [CD137]).
  • Has received prior systemic anti-cancer therapy including investigational agents within 4 weeks prior to study allocation.

(Notes: Participants must have recovered from all AEs due to previously administered therapies to ≤ Grade 1 or baseline. If a participant received major surgery, they must have recovered adequately from the toxicity and/or complications from the intervention prior to starting study treatment.)

  • Has received prior radiotherapy within 2 weeks of start of study treatment.
  • Is currently participating in or has participated in a study of an investigational agent or has used an investigational device within 4 weeks prior to the first dose of study treatment.
  • Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis.
  • Has an active autoimmune disease that has required systemic treatment in the past 2 years (e.g. with use of disease-modifying agents, anticoagulants, corticosteroids or immunosuppressive drugs).
  • Has a history of (noninfectious) pneumonitis that required steroids or has current pneumonitis.
  • Has an active infection requiring systemic therapy.
  • Has a known history of human immunodeficiency virus (HIV) infection.
  • Has a known history of Hepatitis B or known active Hepatitis C virus infection.
  • Is pregnant or breastfeeding or expecting to conceive or father children within the projected duration of the study, starting with the screening visit through 120 days after the last dose of study treatment.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03284424

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Sponsors and Collaborators
Merck Sharp & Dohme LLC
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Study Director: Medical Director Merck Sharp & Dohme LLC
  Study Documents (Full-Text)

Documents provided by Merck Sharp & Dohme LLC:
Additional Information:
Publications of Results:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
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Responsible Party: Merck Sharp & Dohme LLC
ClinicalTrials.gov Identifier: NCT03284424    
Other Study ID Numbers: 3475-629
MK-3475-629 ( Other Identifier: Merck )
KEYNOTE-629 ( Other Identifier: Merck )
2017-000594-37 ( EudraCT Number )
First Posted: September 15, 2017    Key Record Dates
Results First Posted: November 19, 2021
Last Update Posted: February 27, 2023
Last Verified: February 2023
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf
URL: http://engagezone.msd.com/ds_documentation.php

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Merck Sharp & Dohme LLC:
Programmed Cell Death-1 (PD1, PD-1)
Programmed Cell Death 1 Ligand 1(PDL1, PD-L1)
Programmed Cell Death 1 Ligand 2 (PDL2, PD-L2)
Additional relevant MeSH terms:
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Carcinoma, Squamous Cell
Neoplasms, Glandular and Epithelial
Neoplasms by Histologic Type
Neoplasms, Squamous Cell
Antineoplastic Agents, Immunological
Antineoplastic Agents
Immune Checkpoint Inhibitors
Molecular Mechanisms of Pharmacological Action