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Comprehensively assess thyroid function
Goiter evaluation is usually part of a broader thyroid assessment, but “goiter testing” is not the name of a specific standalone test.
When a goiter, or enlarged thyroid gland, is present, a doctor may recommend blood tests such as TSH, FT4, FT3, and thyroid antibody tests, together with a thyroid ultrasound to assess the gland’s size and structure and to identify thyroid nodules when necessary.
- Healthy adults without symptoms or risk factors should begin thyroid testing at age 35, with repeat testing every 5 years or as part of routine health check-ups.
- People with a family history of thyroid disease, autoimmune conditions, or a history of treatment involving the neck area should undergo thyroid testing every 6 – 12 months, or as recommended by a specialist.
- People who have been diagnosed with and are currently receiving treatment for thyroid disease should undergo thyroid testing every 6 – 12 months, or as recommended by a specialist.
Pregnant women with thyroid disease or risk factors for thyroid disorders may need thyroid testing several times during pregnancy, typically every 4 weeks from early pregnancy through mid-pregnancy. After delivery, thyroid testing may also be recommended during the first few months of postpartum.
No. DIAG’s thyroid function test packages include blood tests only.
Blood tests assess thyroid function but do not evaluate the structure of the thyroid gland. If you notice a lump in the neck, difficulty swallowing, or persistent hoarseness, a thyroid ultrasound may be needed to check for thyroid nodules.
In addition, high-dose vitamin B7 (biotin) supplements should be discontinued for at least 2 days before blood collection, as biotin may cause falsely low TSH and falsely high FT4 results, potentially leading to a mistaken diagnosis of hyperthyroidism.
