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Thyroid Disorders Message Board

Thyroid Disorders Board Index

I'm confused about T4 and Free T4 - what does it mean when one is high and one is normal?

I'll be going for the uptake scan soon so I guess I'll have more info. I have had two FNAs both benign and a few ultrasounds.

Thyroxine (T4) 12.3 ug/dL 4.5-12.0 H
Free Thyroxine Index 3.2 1 1.2-4.9 N
T3 Uptake 26 % 24-39 N

TSH 0.131 uIU/mL 0.450-4.500 L

Just sitting here by myself confused by all these numbers. 26% of what for example.

Thanks for any insight.

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