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Completed Phase 2 Interventional Results available

A Trial of Pembrolizumab in Combination With Chemotherapy and Radiotherapy in Stage III NSCLC (KEYNOTE-799, MK-3475-799)

ClinicalTrials.gov ID: NCT03631784

Public ClinicalTrials.gov record NCT03631784. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Oct 30, 2026, 12:36 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Phase 2 Trial of Pembrolizumab (MK-3475) in Combination With Platinum Doublet Chemotherapy and Radiotherapy for Participants With Unresectable, Locally Advanced Stage III Non-Small Cell Lung Cancer (NSCLC) (KEYNOTE-799)

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

This is a trial in adult participants with unresectable, locally advanced, Stage III non-small cell lung cancer (NSCLC) treated with pembrolizumab in combination with platinum doublet chemotherapy and standard thoracic radiotherapy followed by pembrolizumab monotherapy. The primary hypothesis of the trial is that within each platinum doublet chemotherapy cohort, the percentage of participants who develop Grade 3 or higher pneumonitis is ≤10% and estimation of objective response rate (ORR) by blinded independent central review (BICR).

Study identification

NCT ID
NCT03631784
Recruitment status
Completed
Study type
Interventional
Phase
Phase 2
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Enrollment
216 participants

Conditions and interventions

Eligibility (public fields only)

Age range
18 Years and older
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Oct 19, 2018 (Actual)
Primary completion
Oct 18, 2021 (Actual)
Completion
Mar 19, 2024 (Actual)
Last update posted
Mar 25, 2025

2018 – 2024

United States locations

U.S. sites
10
U.S. states
10
U.S. cities
10
Facility City State ZIP Site status
St Joseph Heritage Healthcare ( Site 1403) Santa Rosa California 95403 —
North Shore University Health System ( Site 1413) Evanston Illinois 60201 —
Parkview Cancer Institute ( Site 1415) Fort Wayne Indiana 46845 —
UMass Memorial Medical Center ( Site 1417) Worcester Massachusetts 01655 —
Henry Ford Hospital ( Site 1418) Detroit Michigan 48202 —
St. Francis Cancer Treatment Center ( Site 1421) Grand Island Nebraska 68803 —
Rutgers Cancer Institute of New Jersey ( Site 1422) New Brunswick New Jersey 08903 —
CTCA Southwestern ( Site 1428) Tulsa Oklahoma 74133 —
Fox Chase Cancer Center ( Site 1433) Philadelphia Pennsylvania 19111 —
Sanford Cancer Center Oncology Clinic ( Site 1434) Sioux Falls South Dakota 57104 —

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 46 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT03631784, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Mar 25, 2025 · Synced Oct 30, 2026

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Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT03631784 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →