Cryopreserved Ovarian Tissue Transplantation in Patients Who Have Survived Sarcomas and Hematological Tumors

This study is for women who survived blood cancers or sarcomas (bone and soft tissue cancers) and had their ovarian tissue frozen before cancer treatment. It examines whether re-implanting that frozen ovarian tissue can restore hormone function and/or fertility after cancer treatment is complete. **You may be eligible if...** - You previously had ovarian tissue frozen (cryopreserved) before or during cancer treatment - You were diagnosed with Ewing sarcoma, synovial sarcoma, acute lymphoblastic leukemia, acute myeloid leukemia, chronic myeloid leukemia, or myelodysplastic syndrome - Your cancer doctor has approved the reimplantation procedure - For the cryopreservation group: you were between 18 and 37 years old at the time of freezing - For the reimplantation group: you have been cancer-free for at least 5 years **You may NOT be eligible if...** - Your cancer is still active or you have not reached the required remission milestone - Your cancer doctor objects to the procedure due to risk of cancer cells in the ovarian tissue - You do not meet the age or remission criteria Talk to your doctor to see if this trial is right for you.