Journal List > Endocrinol Metab > v.27(4) > 1085976

Yeon, Choi, Choi, Park, Choi, Oh, and Jeon: A Case of Lingual Thyroid Treated by 131I Ablation

Abstract

A lingual thyroid is a rare developmental anomaly caused by the failure of the descent of the thyroid gland anlage early in the course of embryogenesis. The incidence of lingual thyroid has been reported to be 1/100,000. Lingual thyroid is often asymptomatic but may cause dysphagia, dysphonia, upper airway obstruction and hemorrhage. In this report, we described the case of a 50-year-old women experiencing lingual thyroid who had subclinical hypothyroidism. She underwent successful 131I ablation and has done well on thyroid hormone replacement therapy.

Figures and Tables

Fig. 1
Neck computed tomography (CT) images. (A) Axial CT image of the neck revealed the absence of thyroid gland at the normal anatomical location. (B, C) CT of the neck revealed 2.6 × 2.9 × 3.5 cm sized well-defined solid and cystic mass at posterior aspect, mid-line portion of tongue.
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Fig. 2
Histopathologic finding (H&E stain, × 100). Microscopic examination of biopsy specimen showed degenerative varying size follicles lined by some atypical epithelial cells and stromal hyalinization.
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Fig. 3
131I scan showed one focal iodine uptake in tongue base which is suggestive of lingual thyroid.
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Fig. 4
131I whole body scan. Anterior and posterior 131I whole body scan showed focal iodine uptake (arrows) in mid portion of tongue base area. The scan was performed after the radioactive iodine therapy.
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