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TSH Receptor Antibodies (TrAb)


Test Description

This test measures the levels of thyrotropin or TSH receptor antibodies (TRAb) in the blood. TRAb are proteins that can mimic the effects of thyroid-stimulating hormone (TSH), causing the thyroid gland to produce excessive amounts of thyroid hormones. High levels of TRAb are indicative of Graves’ disease, an autoimmune condition that leads to hyperthyroidism.

Indications of the Test

The test is recommended for:

  • Differential diagnosis of the etiology of thyrotoxicosis in patients with ambiguous clinical findings
  • Diagnosing clinically suspected Graves’ disease (e.g., extrathyroidal manifestations of GD) 
  • Monitoring the effects of treatment for Graves’ disease on TRAb levels

Patient Preparation/Instructions

There are no specific preparation instructions for this test. However, it is essential to inform the healthcare provider if the patient has any known allergies or is taking any medications, as these may affect the test results.

Typical Reference Values

The normal range for TRAb levels is typically considered to be within a specific range. However, it is essential to consult with a healthcare professional to determine the appropriate range for an individual’s specific situation.

Turn Around Time

The turn-around time for this test is usually within a few days.

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TSH Receptor Antibodies (TrAb)
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