Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Li-Fraumeni syndrome ?
    ### Response:
    Li-Fraumeni syndrome is a rare disorder that greatly increases the risk of developing several types of cancer, particularly in children and young adults.  The cancers most often associated with Li-Fraumeni syndrome include breast cancer, a form of bone cancer called osteosarcoma, and cancers of soft tissues (such as muscle) called soft tissue sarcomas.
    