hyperthyroxinemia

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{{Infobox medical condition (new)

| name = Hyperthyroxinemia

| synonyms = Hyperthyroxinaemia

| image = Thyroxine.svg

| caption = Thyroxine

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| field = Endocrinology

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Hyperthyroxinemia is a thyroid disease where the serum levels of thyroxine are higher than expected.{{DorlandsDict|four/000051350|four/000051350}} Thyroxine or tetraiodothyronine (T4) is produced by the thyroid gland.

The term is sometimes used to refer to hyperthyroidism, but hyperthyroidism is a more general term. {{DorlandsDict|four/000051350|four/000051350}}

When the level of thyroxine (T4) in the blood exceeds normal range, it can lead to symptoms such as irritability and unexplained weight loss.{{cite web | title = Hyperthyroxinemia | url = https://www.mrlabtest.com/high-T4-blood.htm | website = MrLabTest | access-date = 15 June 2023}}

Types include:

• Familial dysalbuminemic hyperthyroxinemia
• Familial euthyroid hyperthyroxinemia
• Thyroid hormone resistance syndrome