A Study of Pembrolizumab (MK-3475) in Pediatric Participants With an Advanced Solid Tumor or Lymphoma (MK-3475-051/KEYNOTE-051)

A Phase I/II Study of Pembrolizumab (MK-3475) in Children With Advanced Melanoma or a PD-L1 Positive Advanced, Relapsed or Refractory Solid Tumor or Lymphoma (KEYNOTE-051)

This is a two-part study of pembrolizumab (MK-3475) in pediatric participants who have any of the following types of cancer:

• advanced melanoma (6 months to <18 years of age),
• advanced, relapsed or refractory programmed death-ligand 1 (PD-L1)-positive malignant solid tumor or other lymphoma (6 months to <18 years of age),
• relapsed or refractory classical Hodgkin lymphoma (rrcHL) (3 years to <18 years of age), or
• advanced relapsed or refractory microsatellite-instability-high (MSI-H) solid tumors (6 months to <18 years of age), or
• advanced relapsed or refractory tumor-mutational burden-high ≥10 mutation/Mb (TMB-H) solid tumors (6 months to <18 years of age), or
• with adjuvant treatment of resected high-risk Stage IIB, IIC, III, or IV melanoma in children 12 years to <18 years of age

Part 1 will find the maximum tolerated dose (MTD)/maximum administered dose (MAD), confirm the dose, and find the recommended Phase 2 dose (RP2D) for pembrolizumab therapy. Part 2 will further evaluate the safety and efficacy at the pediatric RP2D.

The primary hypothesis of this study is that intravenous (IV) administration of pembrolizumab to children with either advanced melanoma; a PD-L1 positive advanced, relapsed or refractory solid tumor or other lymphoma; advanced, relapsed or refractory MSI-H solid tumor; or rrcHL, will result in an Objective Response Rate (ORR) greater than 10% for at least one of these types of cancer. The 10% assessment does not apply to the MSI-H and TMB-H cohorts.

With Amendment 8, enrollment of participants with solid tumors and of participants aged 6 months to <12 years with melanoma were closed. Enrollment of participants aged ≥12 years to ≤18 years with melanoma continues. Enrollment of participants with MSI-H and TMB-H solid tumors also continues.

Study Overview

• Status: Recruiting
• Conditions: Melanoma; Lymphoma; Solid Tumor; Classical Hodgkin Lymphoma; Microsatellite-instability-high Solid Tumor
• Intervention / Treatment: Biological: Pembrolizumab

• Study Type: Interventional
• Enrollment (Estimated): 370
• Phase: Phase 2; Phase 1

Contacts and Locations

• Study Contact: Name: Toll Free Number; Phone Number: 1-888-577-8839

Study Locations

• Brazil
  • Sao Paulo, Brazil
    • Recruiting
    • MSD Brasil
    • Contact: MSD Online; Phone Number: 0800 012 22 32
• France
  • Paris, France
    • Recruiting
    • MSD France
    • Contact: Dominique Blazy; Phone Number: 33 147548990
• Germany
  • Haar, Germany
    • Recruiting
    • MSD Sharp & Dohme GmbH
    • Contact: German Medical Information Center; Phone Number: 49 800 673 673 673
• Israel
  • Hod Hasharon, Israel
    • Recruiting
    • Merck Sharp & Dohme Co. Ltd.
    • Contact: Gally Teper; Phone Number: 972-9-9533310
• Italy
  • Rome, Italy
    • Recruiting
    • MSD Italia S.r.l.
    • Contact: Barbara Capaccetti; Phone Number: 39 06361911
• Korea, Republic of
  • Seoul, Korea, Republic of, 4130
    • Recruiting
    • MSD Korea LTD
    • Contact: Jongho Ahn; Phone Number: 82-2-331-2000 2015
• Netherlands
  • Haarlem, Netherlands
    • Recruiting
    • Merck Sharp & Dohme BV
    • Contact: Caroline Doornebos; Phone Number: 31 23 515 3362
• Sweden
  • Stockholm, Sweden
    • Recruiting
    • MSD Sweden
    • Contact: Tryggve Ljung; Phone Number: 46 (0)70 545 28 66
• United Kingdom
  • Hoddesdon, United Kingdom
    • Recruiting
    • Merck Sharp & Dohme Ltd.
    • Contact: Natalie White; Phone Number: +44 (7795) 828757
• United States
  • Colorado
    • Aurora, Colorado, United States, 80045
      • Recruiting
      • Call for Information (Investigational Site 0019)
  • Indiana
    • Indianapolis, Indiana, United States, 46202
      • Recruiting
      • Call for Information (Investigational Site 0025)
  • Massachusetts
    • Boston, Massachusetts, United States, 02445
      • Recruiting
      • Call for Information (Investigational Site 0026)
  • New York
    • New York, New York, United States, 10032
      • Recruiting
      • Call for Information (Investigational Site 0031)
  • Tennessee
    • Memphis, Tennessee, United States, 38105
      • Recruiting
      • Call for Information (Investigational Site 0012)
  • Texas
    • Dallas, Texas, United States, 75235
      • Recruiting
      • Call for Information (Investigational Site 0054)

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 6 months to 17 years (Child)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Between 6 months and <18 years of age on day of signing informed consent is documented.
• Histologically- or cytologically-documented, locally-advanced, or metastatic solid malignancy or lymphoma that is incurable and has failed prior standard therapy, or for which no standard therapy exists, or for which no standard therapy is considered appropriate
• Any number of prior treatment regimens
• Tissue (or lymph node biopsy for rrcHL participants) available from an archival tissue sample or, if appropriate, a newly obtained core or excisional biopsy of a tumor lesion not previously irradiated
• Advanced melanoma or PD-L1-positive advanced, relapsed, or refractory solid tumor or lymphoma
• Measurable disease based on RECIST 1.1 (Or based on IWG [Cheson, 2007] [i.e., measurement must be >15 mm in longest diameter or >10 mm in short axis] for rrcHL participants)
• Participants with neuroblastoma with only metaiodobenzylguanidine (MIBG)-positive evaluable disease may be enrolled
• Lansky Play Scale ≥50 for participants from 6 months up to and including 16 years of age; or Karnofsky score ≥50 for participants >16 years of age
• Adequate organ function
• Female participants of childbearing potential should have a negative urine or serum pregnancy test within 72 hours before the first dose of study medication
• Female participant is not a woman of childbearing potential (WOCBP) or is a WOCBP who is abstinent from heterosexual intercourse or using contraception during the intervention period and for at least 120 days after the last dose of study intervention
• Contraceptive use by men should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
• Demonstrate adequate organ function.

Exclusion Criteria:

• Currently participating and receiving study therapy in, or has participated in a study of an investigational agent and received study therapy or used an investigational device within 4 weeks of the date of allocation/randomization
• Diagnosis of immunodeficiency or receiving systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the date of allocation/randomization
• Prior systemic anti-cancer therapy including investigational agent within 2 weeks prior to study Day 1 or not recovered from adverse events due to a previously administered agent
• Prior radiotherapy within 2 weeks of start of study treatment
• Known additional malignancy that is progressing or requires active treatment with the exception of basal cell carcinoma of the skin, squamous cell carcinoma of the skin or carcinoma in situ (eg, breast carcinoma, cervical carcinoma in situ) with potentially curative therapy, or in situ cervical cancer
• Known active central nervous system (CNS) metastases and/or carcinomatous meningitis
• Tumor(s) involving the brain stem
• Severe hypersensitivity (≥ Grade 3) to pembrolizumab and/or any of its excipients
• Active autoimmune disease that has required systemic treatment in past 2 years; replacement therapy (such as thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency) is acceptable
• Has a history of (non-infectious) pneumonitis that required steroids or current pneumonitis.
• Active infection requiring systemic therapy
• Pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the trial through 120 days after the last dose of study medication
• Prior therapy with an anti-programmed cell death (PD)-1, anti-PD-ligand 1 (anti-PD-L1), anti-PD-L2 agent, or any agent directed to another stimulatory or inhibitory T-cell receptor (eg, cytotoxic lymphocyte associated protein-4 [CTLA-4], OX-40, CD137)
• Human immunodeficiency virus (HIV)
• Hepatitis B or C
• Known history of active tuberculosis (TB; Bacillus tuberculosis)
• Received a live vaccine within 30 days of planned start of study medication
• Has undergone solid organ transplant at any time, or prior allogeneic hematopoietic stem cell transplantation within the last 5 years. (Participants who have had an allogeneic hematopoietic transplant >5 years ago are eligible as long as there are no symptoms of Graft Versus Host Disease [GVHD].)
• History or current evidence of any condition, therapy, or laboratory abnormality, or known severe hypersensitivity to any component or analog of the trial treatment, that might confound the results of the trial, or interfere with the participant's participation for the full duration of the study
• Known psychiatric or substance abuse disorders that would interfere with the requirements of the study

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

6

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Melanoma; Participants aged 6 months to <18 years with melanoma receive pembrolizumab, starting dose 2 mg/kg (maximum dose 200 mg), intravenously (IV) once every 3 weeks (Q3W). Enrollment of participants aged 6 months to <12 years with melanoma was closed with Amendment 8. Enrollment of participants aged ≥12 years to ≤18 years with melanoma continues.	Biological: Pembrolizumab; IV infusion; Other Names: MK-3475
Experimental: Solid Tumors and Other Lymphomas; Participants aged 6 months to <18 years with solid tumors and other lymphomas receive pembrolizumab, starting dose 2 mg/kg (maximum dose 200 mg), IV Q3W. Initial enrollment limited to programmed death-ligand 1 (PD-L1)-positive participants. PD-L1-negative participants may enroll if responses are observed. Enrollment of participants with solid tumors and other lymphomas was closed with Amendment 8.	Biological: Pembrolizumab; IV infusion; Other Names: MK-3475
Experimental: rrcHL; Participants aged 3 years to <18 years with rrcHL receive pembrolizumab, starting dose 2 mg/kg (maximum dose 200 mg), IV Q3W.	Biological: Pembrolizumab; IV infusion; Other Names: MK-3475
Experimental: MSI-H; Participants aged 6 months to <18 years with microsatellite-instability-high (MSI-H) solid tumors receive pembrolizumab, starting dose 2 mg/kg (maximum dose 200 mg), IV Q3W.	Biological: Pembrolizumab; IV infusion; Other Names: MK-3475
Experimental: TMB-H; Participants aged 6 months to <18 years with tumor-mutational burden-high ≥10 mutation/Mb (TMB-H) solid tumors receive pembrolizumab, starting dose 2 mg/kg (maximum dose 200 mg), IV Q3W.	Biological: Pembrolizumab; IV infusion; Other Names: MK-3475
Experimental: Adjuvant Melanoma; Participants aged 12 years to <18 years with resected high-risk Stage IIB, IIC, III, or IV melanoma receive pembrolizumab, starting dose 2 mg/kg (maximum dose 200 mg), intravenously (IV) once every 3 weeks (Q3W).	Biological: Pembrolizumab; IV infusion; Other Names: MK-3475

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Objective Response Rate (ORR) by Response Evaluation Criteria in Solid Tumors and Other Lymphoma Version 1.1 (RECIST 1.1) per Site Assessment (Each Disease Indication Evaluated Separately)	The ORR is assessed by RECIST 1.1 per site assessment. The ORR is defined as the percentage of participants who have a response (complete response, CR or partial response, PR) prior to disease progression. Complete Response (CR): Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. Partial Response (PR): At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.	Up to 2 years
ORR by RECIST 1.1 per Site Assessment for MSI-H or TMBH Solid Tumors (Each Cohort Evaluated Separately)	The ORR is assessed by RECIST 1.1 per site assessment. The ORR is defined as the percentage of participants who have a response (complete response, CR or partial response, PR) prior to disease progression. Complete Response (CR): Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. Partial Response (PR): At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.	Up to 2 years
ORR by International Working Group (IWG) Response Criteria (Cheson, 2007) per BICR Assessment for rrcHL Cohort	The ORR is assessed by blinded independent central review utilizing the International Working Group [IWG] response assessment criteria per Cheson 2007 by BICR. The ORR is defined as the percentage of participants who have a response (complete response, CR or partial response, PR) prior to disease progression. CR is the disappearance of all evidence of disease and PR is the regression of measurable disease and no new sites. Participants with missing data are considered non-responders.	Up to approximately 2 years
Number of Participants with Dose-Limiting Toxicities (DLTs)	Number of participants experiencing toxicities that are possibly, probably, or definitely related to study therapy; that meet pre-defined severity criteria; and result in a change in the given dose.	Cycle 1 (Up to 21 days)
Number of Participants Experiencing Adverse Events (AEs)	An adverse event (AE) is defined as any unfavorable and unintended sign including an abnormal laboratory finding, symptom or disease associated with the use of a medical treatment or procedure, regardless of whether it is considered related to the medical treatment or procedure, that occurs during the course of the study.	Up to 27 months
Number of Participants Discontinuing Study Drug Due to AEs	An adverse event (AE) is defined as any unfavorable and unintended sign including an abnormal laboratory finding, symptom or disease associated with the use of a medical treatment or procedure, regardless of whether it is considered related to the medical treatment or procedure, that occurs during the course of the study.	Up to 2 years

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
ORR by IWG Response Criteria (Cheson, 2007) per Site Assessment (rrcHL Cohort)	The ORR is assessed by blinded independent central review utilizing the International Working Group [IWG] response assessment criteria per Cheson 2007 by site assessment. The ORR is defined as the percentage of participants who had a response (complete response, CR or partial response, PR) prior to disease progression. CR is the disappearance of all evidence of disease and PR is the regression of measurable disease and no new sites. Participants with missing data are considered non-responders.	Up to 2 years
DOR per RECIST 1.1 by Site Assessment (Advanced Melanoma, Solid Tumors and Other Lymphoma, Each Disease Indication Is Evaluated Separately)	The duration of overall response is assessed by RECIST 1.1 by site evaluation. The duration of overall response is measured from the time measurement criteria are first met for CR/PR (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented (taking as reference for progressive disease the smallest measurements recorded on study).	Up to approximately 2 years
DOR per RECIST 1.1 by Site Assessment (MSI-H and TMBH, Each Cohort Is Evaluated Separately)	The duration of overall response is assessed by RECIST 1.1 by site evaluation. The duration of overall response is measured from the time measurement criteria are first met for CR/PR (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented (taking as reference for progressive disease the smallest measurements recorded on study).	Up to approximately 2 years
DOR per IWG 2007 (Cheson, 2007) Response by BICR Assessment (rrcHL Cohort)	The duration of overall response is measured from the time measurement criteria are first met for CR/PR (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented (taking as reference for progressive disease the smallest measurements recorded on study).	Up to approximately 2 years
DOR per IWG 2007 (Cheson, 2007) Response by Site Assessment (rrcHL Cohort)	The duration of overall response is measured from the time measurement criteria are first met for CR/PR (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented (taking as reference for progressive disease the smallest measurements recorded on study).	Up to approximately 2 years
DOR per Immune-related Response Evaluation Criteria in Solid Tumors (irRECIST) by Site Assessment (Solid Tumors and Other Lymphoma, Each Disease Indication Evaluated Separately)	The duration of overall response is measured from the time measurement criteria are first met for CR/PR (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented (taking as reference for progressive disease the smallest measurements recorded on study).	Up to approximately 2 years
DOR per Immune-related Response Evaluation Criteria in Solid Tumors (irRECIST) by Site Assessment (MSI-H and TMB-H, Each Cohort Is Evaluated Separately)	The duration of overall response is measured from the time measurement criteria are first met for CR/PR (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented (taking as reference for progressive disease the smallest measurements recorded on study).	Up to approximately 2 years
Progression-free Survival (PFS) Using RECIST 1.1 Criteria by Site Assessment (Solid Tumors and Other Lymphoma, Each Disease Indication Evaluated Separately)	Progression free survival is defined as the time from randomization to the first documented disease progression, or death due to any cause, whichever occurred first. PFS is assessed by using RECIST 1.1 criteria by site assessment. Median PFS will be calculated from the product-limit (Kaplan-Meier) method for censored data.	Up to approximately 2 years
PFS using RECIST 1.1 Criteria by Site Assessment (MSI-H and TMB-H, Each Cohort Evaluated Separately)	Progression free survival is defined as the time from randomization to the first documented disease progression, or death due to any cause, whichever occurred first. PFS is assessed by using RECIST 1.1 criteria by site assessment. Median PFS will be calculated from the product-limit (Kaplan-Meier) method for censored data.	Up to approximately 2 years
PFS using IWG 2007 Criteria (Chesson 2007) by BICR Assessment (rrcHL Cohort)	Progression free survival is defined as the time from randomization to the first documented disease progression, or death due to any cause, whichever occurred first. PFS is assessed by using IWG 2007 criteria (Chesson, 2007) by BICR assessment (rrcHL Cohort). Median PFS will be calculated from the product-limit (Kaplan-Meier) method for censored data.	Up to approximately 2 years
PFS using IWG 2007 Criteria (Chesson, 2007) by Site Assessment (rrcHL Cohort)	Progression free survival is defined as the time from randomization to the first documented disease progression, or death due to any cause, whichever occurred first. PFS is assessed by using IWG 2007 criteria (Chesson, 2007) by site assessment. Median PFS will be calculated from the product-limit (Kaplan-Meier) method for censored data.	Up to approximately 2 years
PFS Using irRECIST Criteria by Site Assessment	Progression free survival is defined as the time from randomization to the first documented disease progression, or death due to any cause, whichever occurred first. PFS is assessed by using irRECIST criteria by site assessment. Median PFS will be calculated from the product-limit (Kaplan-Meier) method for censored data.	Up to approximately 2 years
Disease Control Rate by RECIST 1.1 Using Site Assessment (Solid Tumors and Other Lymphoma, Each Disease Indication Evaluated Separately)	Disease Control Rate is defined as the percentage of participants with a response of CR, PR, or SD. Complete Response (CR): Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. Partial Response (PR): At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. Stable Disease is neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum diameters while on study. Progressive Disease is least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. (Note: the appearance of one or more new lesions is also considered progression).	Up to approximately 2 years
Disease Control Rate by RECIST 1.1 Using Site Assessment (MSIH and TMB-H, Each Cohort Evaluated Separately)	Disease Control Rate is defined as the percentage of participants with a response of CR, PR, or SD. Complete Response (CR): Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. Partial Response (PR): At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. Stable Disease is neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum diameters while on study. Progressive Disease is least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. (Note: the appearance of one or more new lesions is also considered progression).	Up to approximately 2 years
Disease Control Rate by irRECIST Using Site Assessment (Solid Tumors and Other Lymphomas, Each Disease Indication Evaluated Separately)	Disease Control Rate is defined as the percentage of participants with a response of CR, PR, or SD. Complete Response (CR): Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. Partial Response (PR): At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. Stable Disease is neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum diameters while on study. Progressive Disease is least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. (Note: the appearance of one or more new lesions is also considered progression).	Up to approximately 2 years
Overall Survival	Overall survival is defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis will be censored at the date of the last follow-up. Median overall survival will be calculated from the product-limit (Kaplan-Meier) method for censored data.	Up to approximately 2 years
Objective irRECIST Response Rate by Site Assessment (Each Disease Indication Evaluated Separately)	The ORR is assessed by irRECIST per site assessment.	Up to approximately 2 years
Area Under the Concentration Curve (AUC) for Pembrolizumab	The AUC of pembrolizumab when administered as monotherapy will be determined.	Predose Cycles 1, 2, 4, 8 and every 4 cycles thereafter, and within 30 minutes post infusion at Cycles 1 and 8. Additional single pharmacokinetic samples obtained in Cycle 1 between 72 to 168 hours post-dose, and Cycle 1 at 336 hours post-dose

Collaborators and Investigators

• Sponsor: Merck Sharp & Dohme LLC
• Investigators: Study Director: Medical Director, Merck Sharp & Dohme LLC

Publications and helpful links

General Publications

• Geoerger B, Kang HJ, Yalon-Oren M, Marshall LV, Vezina C, Pappo A, Laetsch TW, Petrilli AS, Ebinger M, Toporski J, Glade-Bender J, Nicholls W, Fox E, DuBois SG, Macy ME, Cohn SL, Pathiraja K, Diede SJ, Ebbinghaus S, Pinto N. Pembrolizumab in paediatric patients with advanced melanoma or a PD-L1-positive, advanced, relapsed, or refractory solid tumour or lymphoma (KEYNOTE-051): interim analysis of an open-label, single-arm, phase 1-2 trial. Lancet Oncol. 2020 Jan;21(1):121-133. doi: 10.1016/S1470-2045(19)30671-0. Epub 2019 Dec 4.

Helpful Links

• Merck Clinical Trials Information
• Plain Language Summary

Study record dates

Study Major Dates

• Study Start (Actual): March 18, 2015
• Primary Completion (Estimated): October 25, 2027
• Study Completion (Estimated): October 25, 2027

Study Registration Dates

• First Submitted: January 6, 2015
• First Submitted That Met QC Criteria: January 6, 2015
• First Posted (Estimated): January 7, 2015

Study Record Updates

• Last Update Posted (Actual): April 5, 2024
• Last Update Submitted That Met QC Criteria: April 4, 2024
• Last Verified: April 1, 2024

More Information

Terms related to this study

• Keywords: PD-1; PD-L1; PD1; PDL1; cHL; MSI-H
• Additional Relevant MeSH Terms: Pathologic Processes; Skin Diseases; Immune System Diseases; Neoplasms by Histologic Type; Lymphoproliferative Disorders; Lymphatic Diseases; Immunoproliferative Disorders; Neoplasms by Site; Neuroectodermal Tumors; Neoplasms, Germ Cell and Embryonal; Neoplasms, Nerve Tissue; Neuroendocrine Tumors; Nevi and Melanomas; Genomic Instability; Skin Neoplasms; Neoplasms; Lymphoma; Melanoma; Microsatellite Instability; Molecular Mechanisms of Pharmacological Action; Antineoplastic Agents; Antineoplastic Agents, Immunological; Immune Checkpoint Inhibitors; Pembrolizumab
• Other Study ID Numbers: 3475-051; MK-3475-051 (Other Identifier: Merck Protocol Number); 2022-501257-36-00 (Registry Identifier: EU CT Number); 2014-002950-38 (EudraCT Number)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No