antimicrosomal antibodies

antimicrosomal antibodies

Antithyroid microsomal antibodies Endocrinology Antibodies directed against components of thyroid microsomes, in particular peroxidase; AMAs are the most useful of antithyroid antibodies as they are often present in thyroid disease, and in higher titers than those for antithyroglobulin antibodies, especially in younger Pts; AMAs are present in Hashimoto's thyroiditis-99% positive, Graves' disease-80%, hypothyroidism, atrophic thyroiditis, and are ↑ in the elderly. See Antithyroglobulin antibodies, Antithyroid antibodies.