Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Systemic scleroderma ?
    ### Response:
    Systemic scleroderma is an autoimmune disorder that affects the skin and internal organs. It is characterized by the buildup of scar tissue (fibrosis) in the skin and other organs. The fibrosis is caused by the body's production of too much collagen, which normally strengthens and supports connective tissues.
    