Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Soft Tissue Sarcoma ?
    ### Response:
    Your soft tissues connect, support, or surround other tissues. Examples include your muscles, tendons, fat, and blood vessels. Soft tissue sarcoma is a cancer of these soft tissues. There are many kinds, based on the type of tissue they started in. They may cause a lump or swelling in the soft tissue.
    