Thyroid Peroxidase Test (cont.)

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What does a positive thyroid peroxidase test mean?

  • Most people with chronic thyroiditis (70%-90%) display a positive TPO test. The test is also positive in lesser numbers of people with other thyroid diseases.
  • Other autoimmune disorders that may cause a positive TPOAb test include:
  • About 3% of people with a positive TPOAb test show no evidence of disease.
  • The chance of having a positive TPOAb test is greater in females and increases with age.

What are other names for thyroid peroxidase test?

This test goes by a confusing number of names, including:

  • thyroid peroxidase (TPO) antibody (TPOAb) test,
  • thyroid peroxidase autoantibody test,
  • antimicrosomal antibody test, and
  • antithyroid microsomal antibody test.

Previous contributing author: Frederick Hecht, MD, FAAP

Medically reviewed by John A. Seibel, MD; Board Certified Internal Medicine with a subspecialty in Endocrinology & Metabolism

REFERENCE:

"Laboratory assessment of thyroid function"
uptodate.com


Medically Reviewed by a Doctor on 2/4/2014

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Thyroid Peroxidase Test - Diagnosis Question: Were you diagnosed with an autoimmune or other type of disorder from your thyroid peroxidase results? Please explain.