Research Article

Thyroid function after subtotal thyroidectomy for hyperthyroidism.

Br Med J 1975; 1 doi: (Published 04 January 1975) Cite this as: Br Med J 1975;1:25
  1. D Evered,
  2. E T Young,
  3. W M Tunbridge,
  4. B J Ormston,
  5. E Green,
  6. V B Petersen,
  7. P H Dickinson


    Among 76 patients who had had a subtotal thyroidectomy for hyperthyroidism from one to seven years previously recurrent hyperthyroidism was found in three and hypothyroidism in 13. The remaining 60 subjects were clinically euthyroid but a raised level of serum thyroid-stimulating hormone (TSH; greater than 5-0 mu U/ml) was found in 39. Analysis of the data showed that their serum thyroxine was significantly lower than in the subjects with a normal TSH. The serum triiodothyronine (T-3) was similar in both groups. It is concluded that subjects with a raised TSH remain clinically euthyroid by maintaining a normal serum T-3 concentration. There was no evidence of any long-term progressive deterioration of thyroid function after subtotal thyroidectomy.