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Anti-thyroid peroxidase (anti-TPO) antibodies are specific for the autoantigen TPO, a 105 kDa glycoprotein that catalyses iodine oxidation and thyroglobulin tyrosyl iodination reactions in the thyroid gland. [5] Most antibodies produced are directed to conformational epitopes of the immunogenic carboxyl-terminal region of the TPO protein ...
A goiter is a diffuse, often symmetric, swelling of the thyroid gland visible in the anterior neck that may develop. [13] The thyroid gland may become firm, large, and lobulated in Hashimoto's thyroiditis, but changes in the thyroid can also be non-palpable. [14] Enlargement of the thyroid is due to lymphocytic infiltration, and fibrosis. [15]
Antibodies that attack the thyroid are what causes most types of thyroiditis. It can also be caused by an infection, like a virus or bacteria, which works in the same way as antibodies to cause inflammation in the glands, such as in the case of subacute granulomatous thyroiditis (de Quervain). [2]
Autoimmune attack of the pituitary gland resulting in reduced hormone production was first discovered as a result of an autopsy in 1962. The autopsy described destruction of the pituitary and thyroid consistent with autoimmune attack and included atrophy of the adrenal glands. [16]
Hashimoto’s disease is an autoimmune condition in which your immune system mistakenly attacks this gland, reducing thyroid hormone production and symptoms that affect your whole body ...
Thyroid antibodies – both antithyroid peroxidase antibodies (anti-TPO, antithyroid microsomal antibodies, anti-M) and antithyroglobulin antibodies (anti-Tg) – in the disease are elevated, but their levels do not correlate with the severity. [citation needed]