Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Amyotrophic lateral sclerosis ?
    ### Response:
    Is genetic testing available for amyotrophic lateral sclerosis? Yes. Clinical genetic testing is currently available for several genes in which mutations are known to cause ALS. Genetic testing on a research basis is also available for select susceptibility genes associated with ALS.
    