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3 Οκτ 2022 · If you have higher-than-normal T4 or free T4 levels, it could indicate thyrotoxicosis. This can result from several situations and conditions, including hyperthyroidism (overactive thyroid), thyroid inflammation ( thyroiditis ) and taking excessive amounts of thyroid medication.
5 Σεπ 2023 · Tests measuring free T4 – either a free T4 (FT4) or free T4 index (FTI) – more accurately reflect how the thyroid gland is functioning when checked with a TSH. The finding of an elevated TSH and low FT4 or FTI indicates primary hypothyroidism due to disease in the thyroid gland.
3 Οκτ 2023 · For instance, a high TSH and low T4 may suggest Hashimoto’s disease, while a low TSH and high T4 may suggest Graves' disease. Different combinations of values can mean different things, and there is often more than one meaning.
9 Οκτ 2024 · Normal thyroid-stimulating hormone (TSH) levels generally fall between 0.4 and 4.5 milliunits per liter (mU/L). TSH levels higher than 4.5 mU/L usually indicate an underactive thyroid (hypothyroidism), and low TSH levels—below 0.4 mU/L—indicate an overactive thyroid (hyperthyroidism).
15 Μαΐ 2024 · This thyroid test analyzer will help you understand your TSH, T3, T4, and other thyroid function test results. Select a test and enter your lab value to learn more.
22 Ιαν 2024 · In Summary, What Could a low TSH Level Indicate? Subclinical Hyperthyroidism: overactive thyroid, leading to TSH levels falling below 0.4 mU/L to minimize gland stimulation, while free T4 levels remain normal. Patients usually don’t exhibit symptoms.
If the TSH level is low and the FT4 result is high this suggests an overactive thyroid (hyperthyroidism) that requires treatment. If the TSH level is slightly raised but the FT4 level is still within the normal reference range this is called subclinical hypothyroidism or mild thyroid failure.
