Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Fibrodysplasia ossificans progressiva ?
    ### Response:
    What are the signs and symptoms of Fibrodysplasia ossificans progressiva? Fibrodysplasia ossificans progressiva (FOP) is characterized by the gradual replacement of muscle tissue and connective tissue (such as tendons and ligaments) by bone, restricting movement.
    