In autoimmune thyroid disease, which autoantibodies are commonly associated with Hashimoto's thyroiditis and Graves' disease?

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Autoimmune thyroid diseases show distinct antibody patterns that mirror their underlying mechanisms. Hashimoto's thyroiditis involves antibodies against thyroid antigens such as thyroid peroxidase and thyroglobulin, reflecting autoimmune destruction of thyroid tissue; TPO antibodies are the most common and sensitive marker for Hashimoto's. Graves' disease is driven by antibodies that stimulate the TSH receptor, known as TSH receptor antibodies (thyroid-stimulating immunoglobulins or TRAb/TSI), leading to overproduction of thyroid hormone. Thus, the typical pairing is Hashimoto's with TPO and thyroglobulin antibodies, and Graves' with TSH receptor antibodies. Other options misassign the antibodies, for example linking TSH receptor antibodies to Hashimoto's or predicting Graves' involvement of thyroglobulin or TPO antibodies as the primary drivers.