Korean J Radiol.  2021 May;22(5):840-860. 10.3348/kjr.2020.0578.

2020 Imaging Guidelines for Thyroid Nodules and Differentiated Thyroid Cancer: Korean Society of Thyroid Radiology

  • 1Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
  • 2Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
  • 3Department of Radiology, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea.
  • 4Department of Radiology and Thyroid Center, Daerim St. Mary's Hospital, Seoul, Korea
  • 5Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
  • 6Department of Radiology, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
  • 7Department of Radiology, Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
  • 8Department of Radiology and Thyroid Center, Chungang University Hospital, Chungang University College of Medicine, Seoul, Korea.
  • 9Department of Radiology and Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
  • 10Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University College of Medicine, Seoul, Korea.
  • 11Department of Radiology, Hanyang University Hospital, Hanyang University College of Medicine, Seoul, Korea
  • 12Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea
  • 13Division for Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
  • 14Department of Radiology, Gangneung Asan Hospital, Ulsan University College of Medicine, Gangneung, Korea.


Imaging plays a key role in the diagnosis and characterization of thyroid diseases, and the information provided by imaging studies is essential for management planning. A referral guideline for imaging studies may help physicians make reasonable decisions and minimize the number of unnecessary examinations. The Korean Society of Thyroid Radiology (KSThR) developed imaging guidelines for thyroid nodules and differentiated thyroid cancer using an adaptation process through a collaboration between the National Evidence-based Healthcare Collaborating Agency and the working group of KSThR, which is composed of radiologists specializing in thyroid imaging. When evidence is either insufficient or equivocal, expert opinion may supplement the available evidence for recommending imaging. Therefore, we suggest rating the appropriateness of imaging for specific clinical situations in this guideline.


Thyroid; Thyroid malignancy; Thyroid nodule; Thyroid recurrent cancers; Guideline
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