SEARCH

SEARCH BY CITATION

Keywords:

  • thyroid;
  • fine-needle aspiration;
  • atypia;
  • atypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS);
  • Bethesda

Abstract

Thyroid fine-needle aspiration has developed into a key test in the evaluation of thyroid nodules. Although the interpretation of thyroid aspirates containing mild abnormalities is problematic, the introduction of the atypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS) category in The Bethesda System for Reporting Thyroid Cytopathology (TBSRTC) has helped to delineate such cases in a systematic and clinically meaningful manner. Herein the authors review the cytomorphologic features associated with the AUS/FLUS interpretation and summarize the results of studies conducted since the implementation of TBSRTC. Cancer (Cancer Cytopathol) 2012;. © 2011 American Cancer Society.