Thyroid (Anti-TPO) antibodies
- Description
- The immunoassay assay used by the laboratory tests for highly purified thyroid peroxidase (TPO) antigens. 75% - 90% of patients with Hashimoto's thyroiditis have anti-TPO antibodies. The autoantibody is also present in 75% of patients with Graves' disease and some 60% with postpartum thyroiditis. Anti-TPO may also be found in sub-clinical hypothyroidism (normal free T4 and elevated TSH) and autoimmune endocrinopathy.
- Related condition
- Reference range
- TPO negative 0 - 150 TG negative 0 - 150
- Units
- U/ml
- Testing site
- Synnovis : Reference Services : Blackfriars Hub
- Laboratory
- Diagnostic Immunology
- Sample type and volume required
- Clotted (Golt top vacutainer)
- Special sample instructions
All tests are compromised by prolonged transit times. For this reason, date of bleed and date of postage must be provided with each request.
- Storage and transport
- Serum stored at 4°C should be sent by first class post
- Turnaround time
- 2 days
- Time limit for extra tests
- 10 days