Our study informs physicians and patients on the survival outcomes of undergoing operation for follicular thyroid cancer particularly when using clinical T staging as a stratification method. Similar survival between thyroidectomy versus lobectomy emphasizes that decisions on extent of surgery should take into careful consideration future quality of life as total thyroidectomy requires lifelong pharmacotherapy and higher risk of injury to adjacent structures whereas lobectomy poses higher risk of recurrence. Our findings suggest that demographic factors may ultimately play a bigger role in deciding extent of thyroid resection surgery given similar rates of survival.
Objectives
To examine the association between the extent of surgery and overall survival in follicular thyroid cancer (FTC) patients.
Study Design
Retrospective analysis of the National Cancer Database (NCDB).
Methods
Patients who underwent surgical intervention for FTC from 2004 to 2015 were selected. Patients were >18 years old, with tumor size 1–4 cm, no other malignancies, and >0 follow up time. Patients were divided into two cohorts based on extent of surgery: lobectomy (≥1 lobe resected) and thyroidectomy (total or near total resection). Pearson's chi-squared analysis was used to compare cohorts. Kaplan–Meier survival and Cox hazards models were utilized to determine overall survival between two cohorts with p < 0.05 used for significance.
Results
A total of 6871 patients were identified with FTC, of which 1507 patients underwent lobectomy and 5364 patients underwent total thyroidectomy. There were no significant differences in patient demographics, comorbidity index, local spread, or tumor grade. Patients undergoing lobectomy had mean survival of 12.94 versus 12.71 years for those undergoing thyroidectomy. Extent of surgery was not associated with a significant difference in survival (5 years OS = 96% in lobectomy and 95.5% in total thyroidectomy, p = 0.08). Stratification by tumor grade resulted in no significant difference in survival between lobectomy and thyroidectomy.
Conclusion
Survival time was not significantly different in patients with more extensive resection of FTC.
Level of Evidence
3 Laryngoscope, 2022
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