Dear all, we have a patient with the following history.

 

Known Hyperthyroid on block and replace for 1 year before stopping for re-evaluation. After 6 months the results were

 

TSH – 2.19mU/L (0.27-4.2)

FT3 – 4.8pmol/L (3.95-6.8)

FT4 – 6.5 pmol/L (12-22)

 

The TFTs then recovered to normal before the patient relapsed again. Pt does not want RI or surgery and was put on carbimazole again. After 6mnths this was titrated down to 5mg and gave the following results

 

TSH – 2.64mU/L (0.27-4.2)

FT3 – 4.2pmol/L (3.95-6.8)

FT4 – 6.8 pmol/L (12-22)

 

Patient is clinically euthyroid. Does anyone have any comments on the disproportionately low FT4 and what may be causing this?

 

Thanks

 

Dr Mike Cornes

Senior Clinical Scientist

Clinical Chemistry Dept

New Cross Hospital

Wednesfield Road

Wolverhampton WV10 0QP

01902 307999 ext 8261

 


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