Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Schwannomatosis ?
    ### Response:
    What causes schwannomatosis? Some cases of schwannomatosis are caused by changes (mutations) in the SMARCB1 or LZTR1 genes. SMARCB1 and LZTR1 are tumor suppressor genes, which means that they encode a protein that stops cells from growing and dividing too rapidly or in an uncontrolled way.
    