Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Light chain deposition disease ?
    ### Response:
    Light chain deposition disease (LCDD) involves the immune system, the body's system of protecting ourselves against infection. The body fights infection with antibodies. Antibodies are made up of small protein segments called light chains and heavy chains. People with LCDD make  too many light chains which get deposited in many different tissues and organs of the body.
    