Abstract
Aim: To determine the effect of levothyroxine (L-T4) therapy on the recurrence rate of nodular disease in patients previously treated with lobectomy for benign nodular goiter. Methods: Two hundred and thirty-tree patients (38 males, 195 females; age 49.9±13.1 yr) with no post-surgical evidence of nodular disease in the remnant, were followed-up yearly with serum TSH and ultrasound (US). Nodular recurrence was defined as a lesion of at least 5 mm at US. Patients were divided in 2 groups based on whether or not they had been treated with L-T4 after surgery: Group 1 (45 patients) who did not receive any L-T4, and Group 2 (188 patients) treated with L-T4. Group 2 was further subdivided in Group 2a (123 patients) receiving L-T4 substitutive therapy (TSH≥0.5 and ≤3 mUI/l) and Group 2b (65 patients) receiving L-T4 at TSH-suppressive dose (TSH<0.5 mUI/l). Results: Mean observation period was 5.8±4.7 yr. Overall, 71 out of 233 (30.5%) patients experienced recurrence of thyroid nodular disease: 29 patients (64.4%) in Group 1, 24 (19.5%) patients in Group 2a, and 18 (27.7%) patients in Group 2b. The recurrence rate was significantly lower (p<0.001) in Group 2 compared with Group 1, but no significant difference was observed between Groups 2a and 2b. Conclusion: In patients who have undergone hemithyroidectomy for benign monolobar nodular disease, L-T4 therapy may prevent recurrence of nodular disease. TSH suppression may not be required for prevention of recurrence in the remnant thyroid tissue.
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Alba, M., Fintini, D., Lovicu, R.M. et al. Levothyroxine therapy in preventing nodular recurrence after hemithyroidectomy: A retrospective study. J Endocrinol Invest 32, 330–334 (2009). https://doi.org/10.1007/BF03345722
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DOI: https://doi.org/10.1007/BF03345722