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t3, t4, tsh
Answered by
Mark Lupo, M.D. - Thyroid Nodules, Thyroid Cancer, hyperthyroidism, hypothyroidism, Thyroid Ultrasound
Thyroid & Endocrine Center of Florida Sarasota - FL
Questions in the Thyroid forum are answered by Mark Lupo, MD. Topics covered include Goiter, Graves Disease, Hyperthyroid, Parathyroid/Calcium Problems, Thyroid Cancer, Thyroid Nodules/Cysts, Thyroiditis, Thyroid & Pregnancy, Thyroid Stimulating Hormone (TSH), Thyroid Tests, and Thyroid Surgery.

t3, t4, tsh

by schmit, Sep 28, 2008 05:53PM
My son is 14yrs. old.  His t3 is 446 his t4 is 1.3 and his tsh 5.25.  His tsh has been going up every 3 mo.'s.  What do you think could be causing this.

Thanks.  Sue

by Mark Lupo, M.D., Oct 01, 2008 06:18AM
This looks like a developing (yet mild) subclinical hypothyroidism -- if is has been going up every three months, it is likely a progressive thyroid problem.  Hashimoto's thyroiditis would be the most common explanation. Would see a pediatric endo.  At this point the numbers are slightly abnormal (provided that the T3 of 446 is in the reference range for that lab) and should not be putting him at any significant health risk, but he needs evaluation to help prevent worsening.
Member Comments (2)

by estrelinha, Sep 30, 2008 03:51PM
You must check for thyroid antibodies (anti-Tg and TPO), possible cause can be thyroid autoimmune disease (Hashimoto) . Your son must go to a Pediatric Endocrinologist to evaluate he's symptoms/analyses/thyroid.
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