Testing the Addition of the Immunotherapy Drug, Pembrolizumab, to the Usual Radiation Treatment for Newly Diagnosed Early Stage High Intermediate Risk Endometrial Cancer

Summary

This phase III trial compares whether the addition of pembrolizumab to radiation therapy is more effective than radiation therapy alone in reducing the risk of cancer coming back (recurrence) in patients with newly diagnosed stage I-II endometrial cancer. 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. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. The addition of pembrolizumab to radiation treatment may be more effective than radiation treatment alone in reducing cancer recurrence.

Timeline

Start

2020-04-09

Primary completion

2025-12-30

Completion

2027-02-05

Publications

• Secord AA, Powell MA, McAlpine J. Molecular Characterization and Clinical Implications of Endometrial Cancer. Obstet Gynecol. 2025 Nov 1;146(5):660-671. doi: 10.1097/AOG.0000000000006080. Epub 2025 Sep 18.
• Liu YL, Stadler ZK. The Future of Parallel Tumor and Germline Genetic Testing: Is There a Role for All Patients With Cancer? J Natl Compr Canc Netw. 2021 Jul 28;19(7):871-878. doi: 10.6004/jnccn.2021.7044.

Drugs

Indications