Management of Indeterminate Thyroid Biopsies, 9-Year Experience in Mexico

Abstract

Thyroid nodules are selected for Fine Needle Aspiration Biopsy (FNAB) based on suspicious ultrasonographic characteristics. When thyroid nodule fine-needle aspiration (FNAB) cytologic results show follicular lesion of undetermined significance or atypia of undetermined significance (FLUS/AUS, Bethesda III) or follicular neoplasm (Bethesda IV), the results are often called indeterminate. We present the results in the follow-up of indeterminate (Bethesda III and IV) cytologies in thyroid nodules, from April 2013 to August 2022, in our research center in the State of Mexico.