TSI (Thyroid Stimulating Immunoglobulin) Quest

Anxiety: Elevated TSI levels can cause hyperthyroidism, leading to symptoms like anxiety and nervousness.
Eye bulging: TSI antibodies can affect tissues behind the eyes, potentially causing bulging.
Heat intolerance: Hyperthyroidism caused by TSI increases metabolism, making you feel overly warm.
Hyperthyroidism symptoms: This test directly measures antibodies often responsible for hyperthyroidism, helping pinpoint the cause.
Rapid heartbeat: High TSI levels can overstimulate the thyroid, leading to an increased heart rate.
Tremors: Thyroid hormone excess caused by TSI can lead to shaky hands or tremors.
Weight loss: Increased metabolism due to hyperthyroidism triggered by TSI can cause unintended weight loss.

In stock

SKU

1150-q

Quest Test #: 30551, CPT: 84445

Graves' disease is a classic form of hyperthyroid disease, affecting approximately 0.4% of the population of the United States. It is caused by IgG immunoglobulins, collectively known as thyroid stimulating immunoglobulins (TSI). Patients who are candidates for antithyroid drug therapy may not respond to this treatment when TSI levels are markedly elevated. The determination of TSI can also assist in predicting hyperthyroidism in neonates, due to placental transmission of the immunoglobulins from a mother with hyperthyroidism.

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Why To Buy	This test checks for antibodies that stimulate the thyroid gland, which can help identify the cause of symptoms like anxiety, eye bulging, and rapid heartbeat, potentially indicating Graves' disease. Finding the cause(s) of: Anxiety: Elevated TSI levels can cause hyperthyroidism, leading to symptoms like anxiety and nervousness. Eye bulging: TSI antibodies can affect tissues behind the eyes, potentially causing bulging. Heat intolerance: Hyperthyroidism caused by TSI increases metabolism, making you feel overly warm. Hyperthyroidism symptoms: This test directly measures antibodies often responsible for hyperthyroidism, helping pinpoint the cause. Rapid heartbeat: High TSI levels can overstimulate the thyroid, leading to an increased heart rate. Tremors: Thyroid hormone excess caused by TSI can lead to shaky hands or tremors. Weight loss: Increased metabolism due to hyperthyroidism triggered by TSI can cause unintended weight loss.
Symptoms	Anxiety, Eye bulging, Heat intolerance, Hyperthyroidism symptoms, Rapid heartbeat, Tremors, Weight loss