Stage III Endometrial Cancer

The purpose of this study is to find out whether short-course radiation therapy (1 week instead of the usual 5 weeks) with chemotherapy (carboplatin and paclitaxel) is practical (feasible), meaning that most participants are able to complete the treatment schedule.

This phase II trial tests how well elacestrant with everolimus works for the treatment of estrogen receptor (ER) positive endometrial cancer that has come back after a period of improvement (recurrent), that may have spread from where it first started to nearby tissue, lymph nodes, or distant parts of the body (advanced) or that has spread from where it first started (primary site) to other places in the body (metastatic). Estrogen can cause the growth of cancer cells. Elacestrant lowers the amount of estrogen made by the body. This may help stop the growth of cancer cells that need estrogen to grow. Everolimus is in a class of medications called kinase inhibitors. It is also a type of angiogenesis inhibitor. Everolimus works by stopping cancer cells from reproducing and by decreasing blood supply to the cancer cells. Giving elacestrant with everolimus may be effective for treating patients with recurrent, advanced or metastatic ER positive endometrial cancer.

This study seeks to better understand the recurrence of high-risk endometrial cancer. It will collect information about cancer genetics to find out various hereditary or cancer specific genetic variants that may have a role in diagnosis or management and prognosis of cancer. It also seeks to develop a genetic results and medical record databank for future studies.