TSH levels seem counterintuitive. A high TSH suggests an underactive thyroid gland, while low TSH levels indicate an ...

They also had higher thyroglobulin antibodies, thyroid peroxidase antibodies, fasting glucose, total cholesterol (TC), ...

Intermittent or non-compliance with levothyroxine (L-T4) replacement therapy will result in discordant serum TSH and FT4 values (high TSH/high FT4) because of a persistently unstable thyroid state ...

When TSH is unexpectedly high, ask the laboratory to re-measure the specimen diluted, preferably in thyrotoxic serum, to check for parallelism. Request that the laboratory analyze the specimen by ...