Thyroid Cancer / Nodules & Hyperthyroidism Expert Forum
What is the normal range of T3, T4, TSH after full thyroidectomy
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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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What is the normal range of T3, T4, TSH after full thyroidectomy

Dear Dr Lupo,

I have full thyroidectomy 1.5 year ago after diagnosed with papillary thyroid cancer.
I use to take 150mcg thyroxine, with my TSH at TSH 18.6 uIU/mL, T3/T4 in range.

Just 2 months ago my doctor has increase the regiment to 175mcg, my body weight is 64 kg

The latest blood test shows

T4   2.0ng/dL    
TRIIODOTHYRONINE - TRUE,SER/PLAS,QN,  121 ng/dL  
TSH 0.9 uIU/mL

What would be the optimal range of T3, T4 and TSH for a person with my condition (full thyroidectomy)


Best Regard
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The most important value is the TSH - we try to keep the T4 and T3 within normal range.  With the thyroid cancer history, the TSH goal is a little lower than usual -- and this depends on the risk/stage of thyroid cancer -- in some cases we keep TSH <0.1 but in most it is fine to keep in 0.2-0.5 range.
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