Antithyroid microsomal antibody

Antithyroid microsomal antibody is a test to measure antithyroid microsomal antibodies in the blood. Microsomes are found inside thyroid cells. The body produces antibodies to microsomes when there has been damage to thyroid cells.

A test that comes back as negative for antithyroid microsomal antibodies is considered a normal result. These antibodies are usually not found in a healthy immune system.

If you have an autoimmune disease or thyroid disorder, your antibody levels may rise. A positive test indicates an abnormal result and may be due to a variety of conditions, including:

  • Hashimoto’s thyroiditis, which is a swelling of the thyroid gland that often results in reduced thyroid function
  • Graves’ disease, which is an autoimmune disorder in which the thyroid gland is overactive
  • granulomatous thyroiditis, or subacute thyroiditis, which is a swelling of the thyroid gland that usually follows an upper respiratory infection
  • autoimmune hemolytic anemia, which is a drop in the number of red blood cells due to increased destruction by the immune system
  • nontoxic nodular goiter, which is an enlargement of the thyroid gland with cysts called nodules
  • Sjogren’s syndrome, which is an autoimmune disorder in which the glands that produce tears and saliva are damaged
  • systemic lupus erythematosus, which is a long-term autoimmune disorder affecting your skin, joints, kidneys, brain, and other organs
  • rheumatoid arthritis
  • thyroid cancer
  • Sample of blood serum
  • We perform the test daily