Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Pendred syndrome ?
    ### Response:
    Pendred syndrome is a disorder typically associated with hearing loss and a thyroid condition called a goiter. A goiter is an enlargement of the thyroid gland, which is a butterfly-shaped organ at the base of the neck that produces hormones. If a goiter develops in a person with Pendred syndrome, it usually forms between late childhood and early adulthood.
    