Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Familial isolated hyperparathyroidism ?
    ### Response:
    How is familial isolated hyperparathyroidism diagnosed? The diagnosis of familial isolated hyperparathyroidism (FIHP) is primarily a diagnosis of exclusion. This means that it is diagnosed when no symptoms or genetic features of other forms of familial hyperparathyroidism are present.
    