Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hashimoto's syndrome ?
    ### Response:
    Hashimotos syndrome is a form of chronic inflammation that can damage the thyroid, reducing its ability to produce hormones (hypothyroidism). An early sign of the condition may be enlargement of the thyroid (called a goiter), which can potentially interfere with breathing or swallowing.
    