Multinodular Goitre Presenting as a Clinical Single Nodule: How Effective Is Hemithyroidectomy?

BACKGROUND: Patients who present with a single thyroid nodule that requires surgery will generally undergo hemithyroidectomy. If, however, the subsequent histological examination shows unsuspected multinodular change, there is a risk of recurrence in the remain ing lobe. The aim of this study was to determine the clinical outcome in patients who have had a hemithyroidectomy for a single thyroid nodule that was shown on subsequent histopathological examination to be part of a multinodular goitre. METHODS: A survey was undertaken of patients who were identified from a thyroid surgery database with the following criteria: (i) hemithyroidectomy for clinical single nodule; and (ii) multinodular change on histopathology. Main outcome measures were clinical recurrence rate, the frequency of further thyroid surgery, and the efficacy of thyroxine treatment on recurrence. RESULTS: In the 229 patients studied, the clinical recurrence rate was 12%. Fourteen of the 28 patients with recurrence required further surgery. Thyroxine therapy did not influence the recurrence rate. CONCLUSION: When surgery for a clinically benign single thyroid nodule is indicated, hemithyroidectomy is an adequate surgical procedure in cases where the single nodule is subsequently found to be part of a multinodular goitre. Such patients can be reassured that the chance of clinical recurrence is low. Thyroxine replacement therapy appears not to prevent recurrence.