Thyroid dysfunction following irradiation to the neck

Thyroid functions (serum T3, T4 and TSH) were studied among 35 patients who had external radiation of the neck involving the thyroid gland within the past 10 years, and 10 control patients who had radiation else where in the body but not in the thyroid region. Findings were presented, compared with previous reports and discussed. Routine TFTs one year after radiotherapy was recommended and replacement therapy for patients with raised serum TSH is encouraged.