Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Neurofibromatosis type 1 ?
    ### Response:
    Is genetic testing available for neurofibromatosis type 1? Although it is usually not necessary for diagnosis, genetic testing is available for NF1, the gene known to cause neurofibromatosis type 1. Carrier testing for at-risk relatives and prenatal testing are possible if the disease-causing mutation in the family is known.
    