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- Original Article Clinical Features of Ectopic Thyroid Gland.
- Jin Chul Park, Jung Hyun Oh, Sang Yub Nam, Ji Sung Yoon, Kyu Jang Won, In Ho Cho, Hyung Woo Lee, Choong Ki Lee, Jae Tae Lee
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Endocrinology and Metabolism 1998;13(4):563-571
Published online: January 1, 2001
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Abstract
BACKGROUND
Ectopic thyroid gland is relatively rare condition and a developmental anomaly characterized by an aggregated of thyroid tissue in the midline anywhere from the base of the tongue to the mediastinum. The role of ectopic thyroid in the pathogenesis of non-goitrous sporadic cretinism and primary hypothyroidism has been emphasized. 19 cases of ectopic thyroid for 12 years was presented with Tc-pertechnetate or radioactive iodine, which were diagnosed by scintigraphy. METHODS: We wish to report these 19 cases and 12 cases of brief review of literatures on the incidence, etiology and development, symptomatology, diagnosis and treatment of ectopic thyroid gland was done. RESULTS: The most frequent incidental age was between the age 1 year and 29 years. And the frequency of ectopic thyroid was about 7 times more common in female(27 cases) than in male(4 cases). The location of ectopic thyroid were found to be lingual in 18 cases, sublingual in 9 cases, prelaryngeal in 1 case, and combine with lingual and sublingual in 3 cases. In chief complaints, palpable mass was most common and there were foreign body sensation on throat, dysphagia, dysphonia, and hoarseness. In 15 cases of hypothyroidism, l2 cases were taken thyroid hormone replacement therapy, 1 case was removed ectopic thyroid gland. In 2 of 10 cases of euthyroidism, replacement of thyroid hormone were done and 2 cases were removed ectopic thyroid gland, in 6 cases of unknown thyroid function, 1 case was removed ectopic thyroid gland and 131I therapy was done in 1 case, and others were observed with following up thyroid function test. CONCLUSION: These results suggest that the long terms thyroid function test, thyroglossal duct eyst and malignant change in ectopic thyroid tissue when finding the ectopic thyroid in thyroid scintigraphy were recommended highly.
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