TG and thyroid nodule: <h4>Purpose</h4>This study aimed to evaluate the predictive value of thyroid hormone sensitivity indices and hematological inflammatory markers, in addition to ultrasonographic features, for malignancy in thyroid nodules initially classified as atypia of undetermined significance (AUS).<h4>Methods</h4>Data from 415 thyroid nodules initially diagnosed as Bethesda category III (AUS) on fine-needle aspiration biopsy (FNAB) were retrospectively analyzed.