Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Schwannomatosis ?
    ### Response:
    How is schwannomatosis diagnosed? A diagnosis of schwannomatosis is often suspected based on the presence of characteristic signs and symptoms, especially if there are other family members with the condition. Additional testing can then be ordered to further support the diagnosis and rule out other conditions with similar features (namely, neurofibromatosis type 2).
    