Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose X-linked hypophosphatemia ?
    ### Response:
    How is X-linked hypophosphatemia diagnosed? X-linked hypophosphatemia (XLH) is diagnosed based on clinical observations, biochemical testing, imaging, and family history. Observable signs include low growth rate and noticeable bowing of the legs. X-rays provide more information that can rule out other potential causes for these symptoms.
    