Euthyroid hyperthyroxinemia

What it means

Increased levels of thyroxine without evidence of clinical thyroid disease.

Any functional abnormality of the thyroid gland and the systems that control its rate of production of thyroid hormone (hypothalamic-pituitary-thyroid axis) and the peripheral reactivity to thyroid hormone.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Asymptomatic hyperthyroxinemia