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Dr. Andrew Rynne
Dr. Andrew Rynne

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What does this thyroid test report indicate?

Answered by
Dr. Shehzad Topiwala


Practicing since :2001

Answered : 1663 Questions

Posted on Fri, 26 Aug 2016 in Thyroid Problem and Hormonal Problems
Question: Thyroxine (T4) Free, direct 1.80 ng/dL
TSH 1.920 uIU/mL
Triiodothyronine, free serum 3.7 pg/mL
Are these numbers correlated with a diagnoses of hyperthyroidism?
Answered by Dr. Shehzad Topiwala 1 hour later
Brief Answer:

Detailed Answer:
I have reviewed the attached result. It is quite unlikely you have hyperthyroidism.

I suggest you consult an Endocrinologist in-person and get this evaluated thoroughly. There are a few medical situations where a lab report of thyroid function looks like when actually the person has no thyroid problem.

Examples are:

TBG excess and FDH (Familial Dysalbuminemic Hyperthyroxinemia)

Although the direct Free Thyroxine test that you have undergone at a credible laboratory should reflect normal values in these situations , it has been noted in practice by experts that often this is not the case.

So further blood tests such as

T3 Resin uptake
Total T3
Total T4
Free Thyroxine Index

may be more helpful.

This is a complex matter for a non-endocrinologist. So you will need the services of one to sort this out properly.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar

The User accepted the expert's answer

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