The anti-thyroid peroxidase (anti-TPO) test measures the levels of antibodies against a specific protein found in the thyroid gland. It is often used as a marker for autoimmune thyroid disease, such as Hashimoto’s thyroiditis or Graves’ disease. The test results indicate if the immune system is attacking the thyroid gland, which can cause an underactive or overactive thyroid gland.
Indications for performing the Anti-TPO test
The anti-TPO test is typically ordered when someone is experiencing symptoms of thyroid disease, such as fatigue, weight gain, or hair loss. It can also be ordered as a follow-up test when other thyroid function tests, such as TSH or T4, are abnormal. Additionally, the test can be useful for people with a family history of thyroid disease or autoimmune disorders.
How to prepare for the Anti-TPO test
There is no special preparation required for the anti-TPO test. However, the testing may be affected by certain medications, such as steroids or immunosuppressants. Be sure to tell your healthcare provider about all the medications you are currently taking.
Is there a standard for Anti-TPO antibodies?
Yes, there is a standard for anti-TPO antibodies. However, the specific range may vary depending on the laboratory performing the test. Your healthcare provider can provide you with the appropriate reference range for your results.
Interpretation of Anti-TPO test results:
High levels of anti-TPO antibodies usually indicate autoimmune thyroid disease, although not always. If the test results are positive and the individual displays symptoms of a thyroid condition, further testing may be necessary to determine the best course of treatment. If the results are negative, it is unlikely that the individual has an autoimmune thyroid condition, but other tests may need to be performed. Your healthcare provider will work with you to interpret your results and determine the appropriate next steps.
References
- https://www.portea.com/labs/diagnostic-tests/microsomal-tpo-antibody-80/
- https://www.nibsc.org/documents/ifu/19-260.pdf
- https://www.mayoclinic.org/thyroid-disease/expert-answers/faq-20058114
- https://endocrinology.testcatalog.org/show/TPO
- https://www.btf-thyroid.org/thyroid-antibodies-explained
- https://www.myupchar.com/en/test/anti-tpo-thyroid-peroxidase-antibody
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7505314/
