CI

At a glance

ClinicalIndex Comparison Record
Phase 2Completed· 9 enrolled
Drug / intervention
Pembrolizumab +1 morebiological
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT03304639
NCT03304639Phase 2Completed

A Randomized Phase II Study of Anti-PD1 Antibody [MK-3475 (Pembrolizumab)] Alone Versus Anti-PD1 Antibody Plus Stereotactic Body Radiation Therapy in Advanced Merkel Cell Carcinoma

National Cancer Institute (NCI)·interventional·Posted Oct 9, 2017·Updated May 13, 2026

In Brief

A Phase 2 clinical trial evaluating Pembrolizumab and Stereotactic Body Radiation Therapy for Advanced Merkel Cell Carcinoma and 7 related conditions. Completed, enrolled 9 participants across 254 sites.

Detailed Summary

This randomized phase II trial studies how well pembrolizumab with or without stereotactic body radiation therapy works in treating patients with Merkel cell cancer that has spread to other places in the body (advanced). Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Stereotactic body radiation therapy uses special equipment to position a patient and deliver radiation to tumors with high precision. This method can kill tumor cells with fewer doses over a shorter period and cause less damage to normal tissue. Giving pembrolizumab with stereotactic body radiation therapy may work better in treating patients with Merkel cell cancer.

Study Details

Timeline

Phase 2CompletedFinished
201820192020202120222023202420252026
First PostedOct 9, 2017
Enrollment StartJun 12, 2018
Primary CompletionJun 7, 2022
Study CompletionFeb 19, 2026
TodayJul 2, 2026
Enrollment to primary: 4.0 yearsPosted 8.7 years ago

Interventions

Pembrolizumabbiological

Given IV

Stereotactic Body Radiation Therapyradiation

Undergo SBRT