This clinical trial is focused on studying treatments for endometrial cancer, which is a type of cancer that begins in the lining of the uterus. The study is comparing the effectiveness of a medication called pembrolizumab (also known by its code name MK-3475) against a group of chemotherapy drugs known as platinum doublet chemotherapy. The chemotherapy drugs being used in this study include cisplatin, paclitaxel, carboplatin, and docetaxel. These medications are given through an intravenous infusion, which means they are delivered directly into the bloodstream through a vein.
The purpose of the study is to see how well pembrolizumab works compared to the chemotherapy drugs in treating patients with a specific type of endometrial cancer that is advanced or has come back after treatment. This type of cancer is known as mismatch repair deficient (dMMR) endometrial carcinoma. The study will involve participants receiving either pembrolizumab or the chemotherapy drugs, and their progress will be monitored over time to see which treatment is more effective in controlling the cancer.
Participants in the study will receive treatment for a period of up to 24 months. During this time, doctors will regularly check the size of the cancer and the overall health of the participants to determine how well the treatments are working. The study aims to provide valuable information on which treatment option might be better for patients with this type of endometrial cancer, potentially leading to improved treatment strategies in the future.



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