Total Thyroidectomy versus Bilateral Subtotal Thyroidectomy for Bilateral Multinodular Nontoxic Goiter: A Meta-Analysis.

AIM The aim of this meta-analysis is to assess and validate the feasibility and safety of total thyroidectomy (TT) when compared to bilateral subtotal thyroidectomy (BST) for bilateral multinodular nontoxic goiter (BMNG). MATERIALS AND METHODS PubMed, Web of Knowledge, and Ovid's database were searched for studies published in English language between January 1990 and December 2014. A meta-analysis was performed to compare the complications and recurrences of TT versus BST. The search terms used were 'total thyroidectomy', 'bilateral subtotal thyroidectomy', 'multinodular nontoxic goiter' and 'randomized clinical trial'. The reference lists of relevant studies were checked manually to locate any missing studies. RESULTS Four trials with a total of 1,078 patients were analyzed. Although the incidence of transient hypoparathyroidism was higher in TT than in BST (OR = 2.59, 95% CI [1.58-4.24], p = 0.0002), TT was associated with a significantly lower incidence of recurrence (OR = 0.04, 95% CI [0.01, 0.17], p < 0.0001). There were no statistically significant differences for the presence of transient/permanent recurrent laryngeal nerve palsy and permanent hypoparathyroidism between the two groups. CONCLUSION TT is a feasible and safe procedure for patients with BMNG. Although TT involves a significantly higher risk of postoperative transient hypoparathyroidism, it has a lower recurrence rate than BST.