Optimal Surgical Approaches for Thyroid Cancer: A Comparative Analysis of Efficacy and Complications.

BACKGROUND Completion thyroidectomy (CTx) is performed following hemithyroidectomy (HTx) when the risk of malignancy persists or is discovered postoperatively. Different surgical approaches, including CTx after HTx (CTx-HTx), total thyroidectomy (TTx), and revision surgery after TTx (RTx-TTx), offer varying risks and benefits, including pathological outcomes and complication rates. Understanding the predictors and rates of malignancy in these procedures is crucial for optimizing surgical management of thyroid disorders. MATERIAL AND METHODS This retrospective study analyzed data from January 2014 to October 2019, including 60 patients each in the CTx-HTx and TTx groups, and 47 in the RTx-TTx group. The CTx-HTx group was subdivided based on benign or malignant findings in CTx specimens. Clinicodemographic data and pathological features such as tumor type, size, side, capsular and vascular invasion, extrathyroidal spread, multifocality, and lymph node metastasis were reviewed. RESULTS Age and sex distributions were similar across groups. In the CTx-HTx group, 76.7% of specimens were benign and 23.3% malignant. No significant predictors of malignancy were found between the benign and malignant subgroups in univariate and multivariable analyses. In the TTx group, 75.0% of initial lobes and 13.3% of contralateral lobes were malignant. TTx was associated with a significant postoperative decrease in calcium and longer hospital stays. Multivariable analysis identified TTx as an independent risk factor for hypocalcemia. CONCLUSIONS Reducing overtreatment in thyroid cancer may involve limiting CTx after HTx and considering more conservative initial surgeries, particularly when indications for TTx are not definitive.