Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of X-linked hypophosphatemia ?
    ### Response:
    What are the signs and symptoms of X-linked hypophosphatemia? Symptoms of X-linked hypophosphatemia (XLH) usually begin in early childhood, though severity varies case by case. Early signs include skeletal abnormalities such as noticeably bowed or bent legs, short stature, and irregular growth of the skull.
    