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Falsely undetectable TSH in a euthyroid patient
Monireh Rahimkhani1, Kiana Kazemian2, Rashid Ramezani Daryasari2
11Department of Lab Medical Sciences, Faculty of allied medical Sciences, Tehran University of Medical Sciences, Tehran, Iran.
Background:
Measuring thyroid hormone levels is essential and helpful in the diagnosis of thyroid diseases.
Case Presentation:
We had a patient with undetectable serum TSH level by the Siemens immunoassay, whereas by ELISA and Roche-Abott immunoassay, serum level of TSH was in the normal range.
Conclusion:
If the result of TSH level revealed very low or undetectable through one specific method, it should not be considered necessarily as a symptom of hyperthyroidism. It is to be requested to measure by the other methods with other devices too.
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