Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Myotonic dystrophy ?
    ### Response:
    Myotonic dystrophy is an inherited condition that affects the muscles and other body systems. It is the most common form of muscular dystrophy that begins in adulthood, usually in a person's 20s or 30s. This condition is characterized by progressive muscle loss and weakness, particularly in the lower legs, hands, neck, and face.
    