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International Journal of Endocrinology
Volume 2014, Article ID 350971, 4 pages
Research Article

Long-Term Ultrasound Follow-Up of Thyroid Colloid Cysts

Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Gaegeum-Dong, Busan 614-734, Republic of Korea

Received 20 December 2013; Revised 30 March 2014; Accepted 7 April 2014; Published 22 April 2014

Academic Editor: Jack R. Wall

Copyright © 2014 Dong Wook Kim. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. This study aimed to assess the interval changes of thyroid colloid cysts (TCCs) by performing long-term ultrasound (US) follow-up examinations. Methods. From 2007 to 2008, 437 patients underwent a lobectomy for the treatment of papillary thyroid microcarcinoma. Among them, 268 patients underwent 4 or more postoperative US follow-ups after surgery. This study investigated the prevalence and interval changes of TCCs  mm by using US follow-ups. Results. Among 268 patients, 35 (13.1%) had TCCs  mm by a preoperative thyroid US, and 6 (2.2%) had newly detected TCCs at a US follow-up. Through long-term US follow-up, the interval changes for TCCs were classified as follows: no interval change ( ), gradual increase ( ), gradual decrease ( ), positive fluctuation ( ), negative fluctuation ( ), disappearance ( ), and new detection ( ). None of the TCC cases had a TCC that was ≥10 mm at its largest diameter, and no patient complained of any relevant symptoms pertaining to the TCCs. Conclusions. In this study, TCCs demonstrated various interval changes, but no abrupt increase was found or acute onset of symptoms occurred.