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Infection of Thyroid Cyst Occurring 1 Month after Fine-Needle Aspiration in an Immunocompetent Patient
Int J Thyroidol 2018;11(2):182-188
Published online November 30, 2018;
© 2018 Korean Thyroid Association.

Jung Kyu Park and Eon Ju Jeon

Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, Korea
Correspondence to: Eon Ju Jeon, MD, Department of Internal Medicine, Catholic University of Daegu School of Medicine, 33 Duryugongwon-ro 17-gil, Nam-gu, Daegu 42472, Korea
Tel: 82-53-650-4098, Fax: 82-53-651-4009, E-mail:
Received January 11, 2018; Revised May 22, 2018; Accepted May 24, 2018.
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.
Fine-needle aspiration (FNA) with ultrasonography is considered a minimally invasive and safe procedure. Complications of it are infrequent and occur immediately or within a few days after FNA. Such complications may occur mainly in patients with underlying problems. We here report a rare case of thyroid cystic nodule infection occurring 1 month after FNA in an immunocompetent patient and serial sonographic findings in this patient. A 33-year-old woman with a cystic nodule including partially isoechoic solid areas on the right thyroid gland complained of difficulty swallowing and painful sensations in the right neck 1 month after FNA. On follow-up examination, the cystic nodule and perithyroidal soft tissue were suspicious of infection. The possibility of infection after FNA should be considered even if the patient is immunocompetent in order to prompt evaluation and immediate management with empirical antibiotic therapy to avoid life-threatening complications.
Keywords : Cyst, Fine-needle aspiration, Infection, Thyroid

November 2018, 11 (2)