Thyroid Cancer / Nodules & Hyperthyroidism Expert Forum
Normal TSH, Low Free T4 (.8), High T3 (226)
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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.

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Normal TSH, Low Free T4 (.8), High T3 (226)

Can you tell me exactly what these results mean?  I have a goiter & a cystic nodule on my thyroid.  Do I need to be on any type of meds?  
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97953_tn?1193367871
Meds not necessarily indicated unless the TSH is abnormal.
The nodule/cyst should be evaluated by ultrasound (which has likely already been done)  to see if it requires FNA biopsy.
4 Comments
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97953_tn?1193367871
most common reason for lowish free T4 and high total T3 with normal TSH ----- birth control pill or other estrogen treatment.  No thyroid meds needed if this is the case.
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1431736_tn?1286204932
You say birth control or other estrogen usage is the most common reason for high T3 but what if you have not ever used anything that contains estrogen yet you develop cardiac issues one day a and thyroid panel reveals high T3 but normal TSH and T4 should T3 really be overlooked because TSH says everything is normal? what could cause this to  happen without estrogen usage?
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T3 9 TSH 3.6 What does this mean?
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97953_tn?1193367871
Mark Lupo, M.D.Blank
Thyroid & Endocrine Center of Florida
Sarasota, FL
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