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초록
An intrathyroid thyroglossal duct cyst (TGDC) presented as an anterior neck mass in a 62-year-old male without history of prior thyroid disease or infection. This cyst was clinically indistinguishable from a thyroid nodule. In addition to that, fine needle aspiration cytology revealed normal– looking squamous cells. Diagnosis, work-up, management approach, and treatment of intrathyroid TGDC are discussed as well as distinguishing features between intrathyrod TGDC with tract and without tract. This is the very rare case of intrathyroid TGDC in Korean population and the possibility of intrathyroid TGDC should remain in the differential diagnosis of thyroid nodule.
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Fig. 1.
Thyroid ultrasound images and ultrasound guided fine-needle aspiration (FNA) image of left thyroid gland. 2.2×1.2×3.0 cm sized pre-dominantly cystic lesion (A). This FNA image is only liquid-based acellular specimen (B). After 1 year, 0.9×0.3×1.8 cm sized cystic lesion with calcified debri (C). Only visible many benign- looking squamous cells (D). After 2 years, 0.9×0.3×1.6 cm sized predominantly cystic lesion with calcified debris (E). This FNA image is visible few follicular cells (F).
Fig. 2.
Computed tomography and light microscopic image of pathologic specimen. The hypodense lesion (white arrows) is located in the left thyroid gland. (A) Axial view,(B) Coronal view. Histopathological examination. Hema-toxylin-Eosion staining (H&E staining); the thyroid nodule showed the squamous epithelium lining and pseudo-stratified ciliated columnar cells with thyroid follicles in the sur-rounding colloid. (C) (x 100), (D) (x 400).
Table 1.
Summary of cases of intrathyroid TGDC
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