Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Muir-Torre syndrome ?
    ### Response:
    What causes Muir-Torre syndrome? Muir-Torre syndrome is a subtype of Lynch syndrome and may be caused by changes (mutations) in either the MLH1, MSH2, or MSH6 gene. These genes give the body instructions to make proteins needed for repairing DNA. The proteins help fix mistakes that are made when DNA is copied before cells divide.
    