This phase II/III trial compares the effect of the combination of olaparib and temozolomide to the usual treatment (trabectedin and pazopanib) for uterine leiomyosarcoma that has spread to other places in the body (advanced) after initial chemotherapy has stopped working. Olaparib is a PARP inhibitor. PARP is a protein that helps repair damaged deoxyribonucleic acid (DNA). Blocking PARP may prevent tumor cells from repairing their damaged DNA, causing them to die. PARP inhibitors are a type of targeted therapy. Temozolomide is in a class of medications called alkylating agents. It works by slowing or stopping the growth of tumor cells in the body. The combination of olaparib and temozolomide may work better than the usual treatment in shrinking or stabilizing advanced uterine leiomyosarcoma after initial chemotherapy has stopped working.

This randomized phase II trial studies how well olaparib, cediranib maleate, and Wee1 inhibitor AZD1775 work in treating patients with endometrial cancer that has come back, does not respond to treatment, or has spread to other places in the body. Olaparib, cediranib maleate, and Wee1 inhibitor AZD1775 may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth.

This trial studies how well iohexol works in helping doctors calculate the dose of carboplatin given to patients with cancer. Drugs used in chemotherapy, such as carboplatin, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Understanding how to best calculate the dose of carboplatin given to patients with cancer may help doctors learn how to improve the use of carboplatin in the future.

Patient Population: Early stage vulvar cancer with macrometastasis and/or extracapsular extension in the SLN.  The primary objective of this study is to investigate the safety of replacing inguinofemoral lymphadenectomy by chemoradiation in early-stage vulvar cancer patients with a macrometastasis (>2mm) and/or extracapsular extension in the Sentinel Lymph Node (SLN). The secondary objective is to evaluate the short and long-term morbidity associated with the SLN procedure and chemoradiation.

This phase II/III trial tests whether adding trastuzumab and hyaluronidase-oysk (Herceptin HylectaTM) or pertuzumab, trastuzumab and hyaluronidase-zzxf (PhesgoTM) to the usual chemotherapy (paclitaxel and carboplatin) works to shrink tumors in patients with HER2 positive endometrial serous carcinoma or carcinosarcoma. Trastuzumab and pertuzumab are monoclonal antibodies and forms of targeted therapy that attach to specific molecules (receptors) on the surface of tumor cells, known as HER2 receptors. When trastuzumab or pertuzumab attach to HER2 receptors, the signals that tell the cells to grow are blocked and the tumor cell may be marked for destruction by the body's immune system. Hyaluronidase is an endoglycosidase. It helps to keep pertuzumab and trastuzumab in the body longer, so that these medications will have a greater effect. Hyaluronidase also allows trastuzumab and trastuzumab/pertuzumab to be given by injection under the skin and shortens their administration time compared to trastuzumab or pertuzumab alone. Paclitaxel is a taxane and in a class of medications called antimicrotubule agents. It stops cancer cells from growing and dividing and may kill them. Carboplatin is in a class of medications known as platinum-containing compounds. It works in a way similar to the anticancer drug cisplatin, but may be better tolerated than cisplatin. Carboplatin works by killing, stopping or slowing the growth of tumor cells. Giving Herceptin Hylecta or Phesgo in combination with paclitaxel and carboplatin may shrink the tumor and prevent the cancer from coming back in patients with HER2 positive endometrial serous carcinoma or carcinosarcoma.