Predictors of malignancy in high-risk indeterminate (TIR3B) cytopathology thyroid nodules
Purpose: The classification of indeterminate cytopathology at thyroid fine-needle-aspiration (FNA) has been updated to reduce the number of unnecessary surgery; the 2014 Italian classification introduced the low-risk (TIR3A) and high-risk (TIR3B) subcategories. Aim of this study was to identify the ultrasonographic (US), clinical and cytological predictors of malignancy among TIR3B nodules from a single institution. Methods: A prospective observational study including 1844 patients who underwent thyroid FNA from June 2014 to January 2019.