Linked from

The 16 pages that link to Thyroid function tests, each with the reason it gives.

• Thyroid hormonesRelated: These measurements infer whether hormone production and feedback are appropriately balanced.

• HypothyroidismRelated: Their patterns help confirm hypothyroidism and locate the level of dysfunction.

• Thyroid-stimulating hormoneNarrower topic: TSH is commonly interpreted alongside thyroid hormone levels to assess gland function.

• HyperthyroidismRelated: A suppressed TSH with elevated thyroid hormones commonly supports the diagnosis.

• Hypothalamic–pituitary–thyroid axisRelated: Their patterns reveal whether axis output is excessive, deficient, or discordant.

• LevothyroxineRelated: These tests guide dose adjustments and help detect under- or over-replacement.

• Central hypothyroidismNarrower topic: Interpreting TSH alongside free thyroxine reveals the central pattern.

• ThyroxineRelated: T4 measurements help identify and monitor thyroid dysfunction.

• Graves diseaseRelated: Graves disease typically produces low TSH with elevated free thyroxine or triiodothyronine.

• TriiodothyronineRelated: T3 measurements help evaluate suspected thyroid dysfunction in selected cases.

• Thyrotropin-releasing hormoneRelated: TRH stimulation testing supplements these measurements when central dysfunction is suspected.

• GoiterRelated: They help determine whether a goiter accompanies underactive, overactive, or normal thyroid function.

• PalpitationsRelated: Excess thyroid hormone can cause a fast heartbeat and associated palpitations.

• Blood testBroader topic: They help diagnose underactive or overactive thyroid function.

• Hypokalemic periodic paralysisRelated: They help identify thyrotoxic periodic paralysis, an acquired and treatable look-alike.

• Endocrine system diseasesBroader topic: These tests illustrate how feedback markers help evaluate a specific endocrine gland.