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KMID : 0361020010440080897
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Korean Journal of Otolaryngology - Head and Neck Surgery
2001 Volume.44 No. 8 p.897 ~ p.900
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Dual Ectopic Thyroid : A Case Report
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최진호/Jin Ho Choi
김대형/강희준/이동진/이흥만/Dae Hyung Kim/Hee Jun Kang/Dong Jin Lee/Heung Man Lee
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Abstract
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Ectopic thyroid is an uncommon embryological aberration characterized by the presence of thyroid tissue in a site other than in its usual pretracheal region. It occurs along the path of descent of the developing thyroid primodium from the foramen
cecum.
It most commonly presents as a lingual thyroid, and is the only thyroid in 70% of all cases. It is extremely rare for two ectopic foci of thyroid tissue to present simultaneously. The authors report a recent case of dual ectopic thyroid present
in
the
lingual and infrahyoid area with no thyroid tissue in the pretracheal area in a 15 year-old girl. The presence of dual ectopic thyroid tissue was confirmed by CT and scintigram with 99mTc. The patient had originally been scheduled for surgery
under
the
impression of a thyroglossal duct cyst, but the pre-operative neck CT and thyroid scans revealed the presence of a dual ectopic thyroid, thus preventing unnecessary surgery. Therefore, ultrasound scans or a neck CT's and thyroid scans should be
performed routinely to confirm the presence of thyroid in the normal position and avoid unnecessary surgeries.
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