Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Uterine Sarcoma ?
    ### Response:
    Key Points
                    - Uterine sarcoma is a disease in which malignant (cancer) cells form in the muscles of the uterus or other tissues that support the uterus.    - Being exposed to x-rays can increase the risk of uterine sarcoma.     - Signs of uterine sarcoma include abnormal bleeding.
    