Antithyroglobulin Antibody and Antithyroid Peroxidase Antibody

Antithyroglobulin Antibody and Antithyroid Peroxidase Antibody is a topic covered in the Davis's Lab & Diagnostic Tests.

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Synonym/Acronym:
Thyroid antibodies, antithyroid peroxidase antibodies (thyroid peroxidase [TPO] antibodies were previously called thyroid antimicrosomal antibodies).

Rationale
To assist in diagnosing hypothyroid and hyperthyroid disease.

Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction.

Normal Findings
Method: Immunoassay.

AntibodyConventional Units
Antithyroglobulin antibodyLess than 20 international units/mL
Antiperoxidase antibody
Newborn–3 days0–9 international units/mL
4–30 days0–26 international units/mL
1–12 mo0–13 international units/mL
13 mo–19 yr0–20 international units/mL
20 yr–older adult0–34 international units/mL

Critical Findings and Potential Interventions
N/A

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