Total Thyroidectomy Versus Lobectomy for Thyroid Cancer: Single-Center Data and Literature Review

Abstract

Controversies remain about the ideal risk-based surgical approach for differentiated thyroid cancer (DTC). At a single tertiary care institution, 370 consecutive patients with low- or intermediate-risk DTC were submitted to either lobectomy (LT) or total thyroidectomy (TT) and were followed up. Event-free survival by Kaplan–Meier curves was significantly higher after TT than after LT for the patients with either low-risk (P\u2009=\u20090.004) or intermediate-risk (P\u2009=\u20090.032) tumors. At the last follow-up visit, the prevalence of event-free patients was higher in the TT group than in the LT low-risk group (95% and 87.5%, respectively; P\u2009=\u20090.067) or intermediate-risk group (89% and 50%; P\u2009=\u20090.008). No differences in persistence prevalence were found among microcarcinomas treated by LT or TT (low risk, P\u2009=\u20090.938 vs. intermediate-risk, P\u2009=\u20090.553). Nevertheless, 15% of the low-risk and 50% of the intermediate-risk microcarcinomas treated by LT were submitted to additional treatments. On the other hand, macrocarcinomas were significantly more persistent if treated with LT than with TT (low-risk, P\u2009=\u20090.036 vs. intermediate-risk, P\u2009=\u20090.004). Permanent hypoparathyroidism was more frequent after TT (P\u2009=\u20090.01). After LT, thyroglobulin (Tg)/thyroid-stimulating hormone (TSH) had shown decreasing trend in 68% of the event-free patients and an increasing trend in the persistent cases. Lobectomy can be proposed for low-risk microcarcinomas, although in a minority of cases, additional treatments are needed, and a longer follow-up period usually is required to confirm an event-free outcome compared with that for patients treated with TT. On the other hand, to achieve an excellent response, TT should be favored for intermediate-risk micro- and macro-DTCs despite the higher frequency of postsurgical complications.