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Study identifier: NCT07302347 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

A Study of Pembrolizumab in Japanese Pediatric Participants With Solid Tumors or Lymphomas and Japanese Adult Participants With Merkel Cell Carcinoma (MK-3475-G21/KEYNOTE-G21)

Condition: Malignant Neoplasm · Carcinoma, Merkel Cell · Lymphoma  ·  Sponsor: Merck Sharp & Dohme LLC

PhasePhase 1/Phase 2
Planned participants20
Who can joinAll sexes, 6 Months to no upper limit
Healthy volunteersNo

About this study

Researchers are looking for new ways to treat people with solid tumors, lymphomas (blood cancers), and a certain type of skin cancer. The goals of this study are to learn: * About the safety of pembrolizumab (the study medicine) and if people tolerate it * What happens to different doses of pembrolizumab in a person's body over time * How the cancer responds (gets smaller or goes away) to treatment

This description comes directly from the study's public registry record.

Talk to the study team

Toll Free Number  ·  1-888-577-8839  ·  Trialsites@msd.com

Always discuss trial participation with your own doctor first.

Locations (7)

Nagoya City University Hospital ( Site 0003)Nagoya, Aichi-ken, JapanRecruiting
Nagoya City University Hospital ( Site 0007)Nagoya, Aichi-ken, JapanRecruiting
Sapporo Hokuyu Hospital ( Site 0005)Sapporo, Hokkaido, JapanRecruiting
Hyogo Prefectural Kobe Children's Hospital ( Site 0006)Kobe, Hyōgo, JapanRecruiting
National Cancer Center Hospital ( Site 0002)Chūō, Tokyo, JapanRecruiting
National Hospital Organization Kyushu Cancer Center ( Site 0001)Fukuoka, JapanRecruiting
University Hospital,Kyoto Prefectural University of Medicine ( Site 0004)Kyoto, JapanRecruiting

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Source record: clinicaltrials.gov/study/NCT07302347