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Borderline Thyroid Tumors: a Surgeon’s Perspectives
Int J Thyroidol 2019;12(1):15-18
Published online May 30, 2019;
© 2019 Korean Thyroid Association.

Ki-Wook Chung1 and Dong Eun Song2

Departments of Surgery1 and Pathology2, University of Ulsan College of Medicine, Seoul, Korea
Correspondence to: Ki-Wook Chung, MD, Department of Surgery, University of Ulsan College of Medicine, 88 Olympic-ro
43-gil, Songpa-gu, Seoul 05505, Korea
Tel: 82-2-3010-3962, E-mail:
This work had been presented in 2019 Spring Congress of Korean Thyroid Association.
Received April 23, 2019; Revised May 9, 2019; Accepted May 9, 2019.
This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Borderline thyroid tumors are composed of hyalinizing trabecular tumor (HTT), well differentiated tumor of uncertain malignant potential (WDT-UMP), follicular tumor of uncertain malignant potential (FT-UMP) and non-invasive follicular tumor with papillary like nuclear feature (NIFTP) by World Health Organization (WHO) definition. They have different pathological feature from each other. However, it is difficult to diagnose with diagnostic imaging, fine needle aspiration (FNA) or core biopsy preoperatively. Thus, the diagnosis is usually made after diagnostic lobectomy. Main surgical concerns about borderline tumor are not performing total thyroidectomy because of relatively indolent nature of these tumors. Unfortunately, some of these tumors can be diagnosed as malignant tumor preoperatively. The other surgical concern is performing completion thyroidectomy or not after diagnostic lobectomy. Decision making is difficult even though it is generally considered that lobectomy alone is enough. In this article, we will discuss clinical features of borderline malignant tumors and surgical strategy for these tumors.
Keywords : Borderline neoplasm, Thyroid, Surgery

November 2019, 12 (2)