Safety and Efficacy Study of Investigational Agents as Monotherapy or in Combination With Pembrolizumab (MK-3475) for the Treatment of Extensive-Stage Small Cell Lung Cancer (ES-SCLC) in Need of Second-Line Therapy (MK-3475-B98/KEYNOTE-B98)
NCT ID: NCT04938817
Last Updated: 2025-11-12
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.
RECRUITING
PHASE1/PHASE2
110 participants
INTERVENTIONAL
2021-08-19
2029-12-10
Brief Summary
Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.
Investigational agents will initiate directly in or be added to the efficacy evaluation after an initial evaluation of safety and tolerability of the investigational agent has been completed in a separate study or in the safety lead-in of this study. If an RP2D for a combination being evaluated in the safety lead-in is established from another study, then the efficacy evaluation may begin at the determined RP2D.
There will be no hypothesis testing in this study.
Detailed Description
Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.
Conditions
See the medical conditions and disease areas that this research is targeting or investigating.
Keywords
Explore important study keywords that can help with search, categorization, and topic discovery.
Study Design
Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.
RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
Review each arm or cohort in the study, along with the interventions and objectives associated with them.
Coformulation Pembrolizumab/Quavonlimab
Participants receive pembrolizumab/quavonlimab (coformulation of pembrolizumab 400 mg and quavonlimab 25 mg) administered by intravenous (IV) infusion once every 6 weeks (Q6W) for up to 18 infusions (up to approximately 2 years) or until progressive disease or discontinuation.
coformulation pembrolizumab/quavonlimab
Intravenous (IV) infusion
Coformulation Pembrolizumab/Quavonlimab + Lenvatinib
Participants receive pembrolizumab/quavonlimab (coformulation of pembrolizumab 400 mg and quavonlimab 25 mg) PLUS lenvatinib 20 mg. Pembrolizumab/quavonlimab will be administered by intravenous (IV) infusion once every 6 weeks (Q6W) for up to 18 infusions (up to approximately 2 years) or until progressive disease or discontinuation. Lenvatinib will be administered orally once-daily (QD) until progressive disease or discontinuation.
coformulation pembrolizumab/quavonlimab
Intravenous (IV) infusion
lenvatinib
Oral administration
Coformulation Pembrolizumab/Quavonlimab + MK-4830
Participants receive pembrolizumab/quavonlimab (coformulation of pembrolizumab 400 mg and quavonlimab 25 mg) PLUS MK-4830 800 mg. Pembrolizumab/quavonlimab will be administered by intravenous (IV) infusion once every 6 weeks (Q6W) for up to 18 infusions (up to approximately 2 years) or until progressive disease or discontinuation. MK-4830 will be administered by IV infusion once every 3 weeks (Q3W) for up to 36 infusions (up to approximately 2 years) or until progressive disease or discontinuation.
coformulation pembrolizumab/quavonlimab
Intravenous (IV) infusion
MK-4830
IV infusion
Coformulation Favezelimab/Pembrolizumab
Participants receive favezelimab/pembrolizumab (coformulation of favezelimab 800 mg and pembrolizumab 200 mg) administered by intravenous (IV) infusion once every 3 weeks (Q3W) for up to 36 infusions (up to approximately 2 years) or until progressive disease or discontinuation.
coformulation favezelimab/pembrolizumab
IV infusion
R-DXd
Participants receive 5.6 mg/kg R-DXd via IV infusion every three weeks (Q3W) until progressive disease or discontinuation.
R-DXd
IV Infusion
Interventions
Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.
coformulation pembrolizumab/quavonlimab
Intravenous (IV) infusion
lenvatinib
Oral administration
MK-4830
IV infusion
coformulation favezelimab/pembrolizumab
IV infusion
R-DXd
IV Infusion
Other Intervention Names
Discover alternative or legacy names that may be used to describe the listed interventions across different sources.
Eligibility Criteria
Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.
Inclusion Criteria
* Has histologically or cytologically confirmed diagnosis of ES-SCLC in need of second-line therapy
* Has progressed on or after treatment with an anti-programmed cell death 1 (PD-1)/ programmed cell death ligand 1 (PD-L1) monoclonal antibody (mAb) administered as part of first-line platinum-based systemic therapy for ES-SCLC
* Has ES-SCLC defined as Stage IV (T any, N any, M1a/b/c) by the American Joint Committee on Cancer, Eighth Edition
* Has received 1 prior line of systemic therapy for small cell lung cancer (SCLC)
* If a woman of childbearing potential (WOCBP), participant must have a negative highly sensitive pregnancy test within 24 hours (for a urine test) or 72 hours (for a serum test) before the first dose of study treatment
* Has measurable disease per RECIST 1.1 as assessed by local site investigator/radiology and verified by BICR
* Has submitted an archival tumor tissue sample or newly obtained core, incisional, or excisional biopsy of a tumor lesion not previously irradiated
* Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 assessed within 7 days before allocation/randomization
* Participants who are Hepatitis B surface antigen (HBsAg) positive are eligible if they have received Hepatitis B virus (HBV) antiviral therapy for at least 4 weeks and have undetectable HBV viral load before randomization
* Participants with history of Hepatitis C virus (HCV) infection are eligible if HCV viral load is undetectable at screening
* Has a predicted life expectancy of \>3 months
* Arms A-D:
* Male participants must be abstinent from heterosexual intercourse or agree to use contraception during treatment for at least 7 days after the last dose of lenvatinib. No contraception is required if the participant is receiving pembrolizumab, pembrolizumab/quavonlimab, MK-4830, or favezelimab/pembrolizumab
* Female participants are not pregnant or breastfeeding and are not a WOCBP or if are a WOCBP, are abstinent from heterosexual intercourse or are using contraception during the intervention period and for at least 120 days after the last dose of pembrolizumab, pembrolizumab/quavonlimab, MK-4830, or favezelimab/pembrolizumab or 30 days after the last dose of lenvatinib, whichever occurs last
* Female participants must abstain from breastfeeding during the intervention period and for at least 120 days after the last dose of pembrolizumab, pembrolizumab/quavonlimab, MK-4830, or favezelimab/pembrolizumab or 7 days after the last dose of lenvatinib, whichever occurs last
* Has adequately controlled blood pressure (BP) with or without antihypertensive medications, defined as BP ≤150/90 millimeters of mercury (mm Hg) with no change in antihypertensive medications within 1 week before allocation/randomization
* Arm E:
* If capable of producing sperm, the participant agrees to refrain from donating sperm and abstain from penile-vaginal intercourse or use a penile/external condom when having penile-vaginal intercourse with a nonparticipant of childbearing potential who is not currently pregnant. The length of time required to continue contraception for the study intervention R-Dx-d is 120 days
* If a person of childbearing potential (POCBP) must use a contraceptive method that is highly effective (with a failure rate of \<1% per year), with low user dependency, or if they adhere to penile-vaginal intercourse abstinence as their preferred and usual lifestyle (abstinent on a long-term and persistent basis), during the intervention period and for at least the time needed to eliminate the study intervention after the last dose of study intervention. In addition, the participant agrees not to donate eggs (ova, oocytes) to others or freeze/store eggs during this period for the purpose of reproduction. The length of time required to continue contraception for the study intervention R-Dx-d is 210 days
Exclusion Criteria
* Has received prior systemic anticancer therapy including investigational agents within 4 weeks before start of study treatment
* Has received prior radiotherapy within 2 weeks of start of study treatment
* Has received lung radiation therapy \>30 Gray (Gy) within 6 months before the first dose of study treatment
* Has received a live or live attenuated vaccine within 30 days before the first dose of study treatment
* Has a known additional malignancy that is progressing or has required active treatment within the past 3 years
* Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis. Participants with brain metastases may participate only if they satisfy all of the following: completed treatment (e.g., whole brain radiation treatment, stereotactic radiosurgery, or equivalent) ≥14 days before the first dose of study intervention; have no evidence of new or enlarging brain metastases confirmed by post-treatment repeat brain imaging (using the same modality) performed ≥4 weeks after pretreatment brain imaging; and are neurologically stable without the need for steroids for ≥7 days before the first dose of study intervention as per local site assessment. Participants with untreated brain metastases will be allowed if they are asymptomatic, the investigator determines there is no immediate CNS-specific treatment required, there is no significant surrounding edema, and the brain metastases are of 5 millimeter (mm) or less in size and 3 or less in number.
* Has a history of severe hypersensitivity reaction (≥Grade 3) to any study treatment and/or any of its excipients
* Has an active autoimmune disease that has required systemic treatment in past 2 years except replacement therapy (eg, thyroxine, insulin, or physiologic corticosteroid)
* Has a history of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease
* Has an active infection requiring systemic therapy
* Arms A-D:
* Has had major surgery within 3 weeks before first dose of study treatment
* Has a preexisting ≥Grade 3 gastrointestinal or non-gastrointestinal fistula
* Has clinically significant cardiovascular disease or major arterial thromboembolic event within 12 months before first dose of study intervention, including New York Heart Association Class III or IV congestive heart failure, unstable angina, myocardial infarction, cerebral vascular accident, or cardiac arrhythmia associated with hemodynamic instability
* Has active hemoptysis (bright red blood of at least 0.5 teaspoon) within 3 weeks before the first dose of study treatment
* Has gastrointestinal malabsorption or any other condition that might affect oral study intervention absorption
* Has serious nonhealing wound, ulcer, or bone fracture within 28 days before the start of study treatment
* Has any major hemorrhage or venous thromboembolic events within 3 months before the start of study treatment
* Has a history of inflammatory bowel disease
* Has a history of a gastrointestinal perforation within 6 months before the start of study treatment
* Has a known history of, or active, neurologic paraneoplastic syndrome
* Has received prior therapy with a receptor tyrosine kinase (RTK) inhibitor or anti-cytotoxic T-lymphocyte-associated protein 4 (CTLA-4), anti-immunoglobulin-like transcript (ILT)-4, or anti-lymphocyte-activation gene 3 (LAG-3) agents
* Has received prior therapy with an anti-PD-1/L1 agent and was permanently discontinued from that treatment due to a treatment-related adverse event
* Has received an investigational agent or has used an investigational device within 4 weeks prior to study intervention administration
* Has radiographic evidence of encasement or invasion of a major blood vessel, or of intratumoral cavitation
* Has symptomatic ascites, pleural effusion, or pericardial effusion
* Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior the first dose of study treatment
* Has a known history of Human Immunodeficiency Virus (HIV) infection
* Has concurrent active HBV or HCV
* Has progressive disease as initial response to first-line systemic chemotherapy in combination with PD-1/L1 inhibitor for ES-SCLC
* Has had an allogenic tissue/solid organ transplant
* Arm E:
* Received prior treatment with a CDH6-targeted agent or an ADC that consists of an exatecan derivative that is a topoisomerase I inhibitor (eg, trastuzumab deruxtecan, datopotamab deruxtecan)
* Has received an investigational agent or has used an investigational device within 4 weeks (or 5 half-lives, whichever is shorter) prior to study intervention administration
* Has Chronic steroid treatment (\>10 mg/day prednisone \[or equivalent\] per day), except for inhaled steroids for asthma or COPD, mineralocorticoids (e.g., fludrocortisone) for participants with orthostatic hypotension, topical steroids for mild skin conditions, low-dose supplemental corticosteroids for adrenocortical insufficiency, Premedication for treatment groups and/or premedication in case of any hypersensitivity, or intra-articular steroid injections
* Is an HIV-infected participants with a history of Kaposi's sarcoma and/or Multicentric Castleman's Disease
18 Years
ALL
No
Sponsors
Meet the organizations funding or collaborating on the study and learn about their roles.
Daiichi Sankyo
INDUSTRY
Merck Sharp & Dohme LLC
INDUSTRY
Responsible Party
Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.
Principal Investigators
Learn about the lead researchers overseeing the trial and their institutional affiliations.
Medical Director
Role: STUDY_DIRECTOR
Merck Sharp & Dohme LLC
Locations
Explore where the study is taking place and check the recruitment status at each participating site.
Banner MD Anderson Cancer Center ( Site 0152)
Gilbert, Arizona, United States
Northside Hospital-Northside Hospital Oncology Network ( Site 0156)
Atlanta, Georgia, United States
Parkview Research Center at Parkview Regional Medical Center ( Site 0180)
Fort Wayne, Indiana, United States
Baptist Health Lexington-Research ( Site 0158)
Lexington, Kentucky, United States
University of Kentucky Chandler Medical Center-Medical Oncology ( Site 0157)
Lexington, Kentucky, United States
MFSMC-HJWCI-Oncology Research ( Site 0178)
Baltimore, Maryland, United States
Oncology Hematology West, PC dba Nebraska Cancer Specialists ( Site 0172)
Omaha, Nebraska, United States
Oncology Hematology West, PC dba Nebraska Cancer Specialists ( Site 0179)
Omaha, Nebraska, United States
Cleveland Clinic-Taussig Cancer Center ( Site 0166)
Cleveland, Ohio, United States
UPMC Hillman Cancer Center ( Site 0177)
Pittsburgh, Pennsylvania, United States
St Francis Cancer Center-Research Office ( Site 0167)
Greenville, South Carolina, United States
Virginia Cancer Institute ( Site 0169)
Richmond, Virginia, United States
Westmead Hospital-Department of Medical Oncology ( Site 4004)
Westmead, New South Wales, Australia
The Prince Charles Hospital-Oncology Clinical Trials ( Site 4003)
Brisbane, Queensland, Australia
Monash Health-Oncology Research ( Site 4005)
Clayton, Victoria, Australia
Hollywood Private Hospital-Medical Oncology ( Site 4001)
Perth, Western Australia, Australia
Standort Penzing der Klinik Ottakring-Abteilung für Atemwegs-und Lungenkrankheiten ( Site 3101)
Vienna, , Austria
Klinik Floridsdorf-Abteilung für Innere Medizin und Pneumologie ( Site 3100)
Vienna, , Austria
Cross Cancer Institute ( Site 3004)
Edmonton, Alberta, Canada
Princess Margaret Cancer Centre ( Site 3003)
Toronto, Ontario, Canada
St. Marys Hospital Center ( Site 3000)
Montreal, Quebec, Canada
Jász-Nagykun-Szolnok Megyei Hetényi Géza Kórház-Onkologiai Kozpont ( Site 3800)
Szolnok, Jász-Nagykun-Szolnok, Hungary
Rambam Health Care Campus-Oncology ( Site 3600)
Haifa, , Israel
Shaare Zedek Medical Center-Oncology ( Site 3602)
Jerusalem, , Israel
Meir Medical Center. ( Site 3601)
Kfar Saba, , Israel
Rabin Medical Center-Oncology ( Site 3604)
Petah Tikva, , Israel
Sheba Medical Center-ONCOLOGY ( Site 3603)
Ramat Gan, , Israel
Humanitas-U.O di Oncologia medica ed Ematologia ( Site 3301)
Rozzano, Milano, Italy
ospedale le scotte-U.O.C. Immunoterapia Oncologica ( Site 3300)
Siena, Tuscany, Italy
Ospedale San Raffaele-Oncologia Medica ( Site 3303)
Milan, , Italy
Istituto Europeo di Oncologia IRCCS-Divisione di Oncologia Toracica ( Site 3304)
Milan, , Italy
Narodowy Instytut Onkologii im. Marii Sklodowskiej-Curie - P-Klinika Nowotworow Pluca i Klatki Pier ( Site 3900)
Warsaw, Masovian Voivodeship, Poland
Warminsko-Mazurskie Centrum Chorob Płuc w Olsztynie ( Site 3903)
Olsztyn, Warmian-Masurian Voivodeship, Poland
Krasnoyarsk Regional Oncology Dispensary, Named after Krizhanovsky ( Site 3708)
Krasnoyarsk, Krasnoyarsk Krai, Russia
Saint-Petersburg City Clinical Oncology Dispensary-Department of chemotherapy ( Site 3702)
Saint Petersburg, Leningradskaya Oblast', Russia
GBUZ LOKB-Oncology department #1 ( Site 3701)
Saint Petersburg, Sankt-Peterburg, Russia
GBUZ "SPb CRPCstmc(o)" ( Site 3705)
Saint Petersburg, Sankt-Peterburg, Russia
N.N.Petrov Research Institute of Oncology-Department of Chemotherapy and Innovative Technologies ( Site 3703)
Saint Petersburg, Sankt-Peterburg, Russia
Scientific research institution of oncology named after N.N. Petrov-Thoracic oncology ( Site 3704)
Saint Petersburg, , Russia
Seoul National University Bundang Hospital-Medical Oncology ( Site 4104)
Seongnam, Kyonggi-do, South Korea
Chungbuk National University Hospital ( Site 4106)
Cheongju-si, North Chungcheong, South Korea
Seoul National University Hospital ( Site 4101)
Seoul, , South Korea
Asan Medical Center-Lung Cancer Center ( Site 4103)
Seoul, , South Korea
Samsung Medical Center ( Site 4100)
Seoul, , South Korea
Instituto Catalan de Oncologia - Hospital Duran i Reynals ( Site 3403)
L'Hospitalet de Llobregat, Catalonia, Spain
Hospital Universitari Vall d'Hebron-Oncology ( Site 3401)
Barcelona, , Spain
Hospital Clinic de Barcelona ( Site 3404)
Barcelona, , Spain
Cantonal Hospital St.Gallen-Oncology & Hematology ( Site 3502)
Sankt Gallen, Canton of St. Gallen, Switzerland
Countries
Review the countries where the study has at least one active or historical site.
Central Contacts
Reach out to these primary contacts for questions about participation or study logistics.
Facility Contacts
Find local site contact details for specific facilities participating in the trial.
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Study Coordinator
Role: primary
Related Links
Access external resources that provide additional context or updates about the study.
Merck Clinical Trials Information
Plain Language Summary
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
MK-3475-B98
Identifier Type: OTHER
Identifier Source: secondary_id
KEYNOTE-B98
Identifier Type: OTHER
Identifier Source: secondary_id
2023-507687-38-00
Identifier Type: REGISTRY
Identifier Source: secondary_id
U1111-1296-5646
Identifier Type: REGISTRY
Identifier Source: secondary_id
2020-005628-12
Identifier Type: EUDRACT_NUMBER
Identifier Source: secondary_id
3475-B98
Identifier Type: -
Identifier Source: org_study_id