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Endocrine

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Ultrasound risk stratification systems for thyroid nodule: between lights and shadows, we are moving towards a new era

  • Pierpaolo TrimboliEmail author
  • Cosimo Durante
Viewpoint

Abstract

Ultrasound (US) has long played a major role in the assessment of thyroid nodules and their risk of malignancy, and its importance has been further enhanced over the past decade by the development of a number of US-based risk stratification systems (US-RSSs), referred to in some cases as TIRADS (Thyroid Imaging Reporting And Data Systems). The high-risk categories of all currently available US-RSSs display strong associations to cytological diagnostic classes of “malignant/suspicious-for-malignancy” and the low-risk classes are clearly associated to “not neoplastic/benign” cytology. The introduction of these systems has elevated the diagnostic performance of US to a level approaching that of fine-needle aspiration (FNA) cytology. The time seems ripe to exploit this new level of accuracy to reduce the number of FNAs for nodules likely to be benign (i.e., sonographically classified as low-risk with no suspicious clinical features). In the near future, US-RSS could also become the main tool for diagnosing papillary thyroid cancers. The establishment of a new “international TIRADS”—currently in progress—will be critical to guide us towards a new era.

Keywords

Thyroid nodule Ultrasound risk stratification system AACE/ACE/AME ACR-TIRADS, ATA EU-TIRADS K-TIRADS 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2020

Authors and Affiliations

  1. 1.Clinic for Nuclear Medicine and Competence Center for Thyroid DiseasesImaging Institute of Southern Switzerland, Ente Ospedaliero CantonaleBellinzonaSwitzerland
  2. 2.Faculty of Biomedical SciencesUniversità della Svizzera ItalianaLuganoSwitzerland
  3. 3.Department of Translational and Precision MedicineSapienza University of RomeRomeItaly

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