This clinical trial is focused on studying the safety and effectiveness of a new treatment called IMGN151 for women with certain types of cancer that have returned after treatment. The cancers being studied include recurrent endometrial cancer and recurrent high-grade serous epithelial ovarian cancer, as well as similar cancers affecting the lining of the abdomen and fallopian tubes. IMGN151 is a special type of medication known as an antibody-drug conjugate, which is designed to target and attack cancer cells more precisely.
The purpose of the study is to determine the best dose of IMGN151 that can be safely given to patients and to see how well it works in treating these cancers. The study will be conducted in two main phases. In the first phase, different doses of IMGN151 will be tested to find the safest and most effective dose. In the second phase, the chosen dose will be given to more patients to further assess its effectiveness. Throughout the study, participants will receive IMGN151 through an intravenous infusion, which means the medication will be delivered directly into the bloodstream through a vein.
Participants in the study will be closely monitored for any side effects and to see how their cancer responds to the treatment. The study aims to provide valuable information about the potential benefits and risks of IMGN151 for women with these specific types of recurrent cancers. This research is important for developing new treatment options that could improve outcomes for patients facing these challenging conditions.



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