Endocrinol Metab > Volume 20(4); 2005 > Article
Journal of Korean Endocrine Society 2005;20(4):413-420.
DOI: https://doi.org/10.3803/jkes.2005.20.4.413    Published online August 1, 2005.
Upper Airway Obstruction Caused by Intratracheal Ectopic Thyroid Tissue during Pregnancy.
Eun Young Lee, Byung Wan Lee, Jhingook Kim, Sung Jin Bae, Tae Sik Jung, Hye Seung Jung, Yong Ki Min, Myung Shik Lee, Moon Kyu Lee, Kwang Won Kim, Jae Hoon Chung
1Division of Endocrinology and Metabolism, Sungkyunkwan University School of Medicine, Korea.
2Department of Thoracic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea.
Herein is report an extremely rare case of an intratracheal ectopic thyroid gland related with pregnancy. A 34-year-old woman, in gestational week 11, presented with stridor, progressive dyspnea and a choking sensation during her second pregnancy. Computed tomography of the neck and chest revealed a round intratracheal mass obstructing the airway. A bronchoscopic biopsy with LASER cauterization was performed, and the histological finding revealed normal thyroid tissue. The external thyroid of the patient was evaluated, but only found benign nodules in the thyroid gland. She underwent a segmental resection of the trachea, including the mass and the 1st tracheal cartilage. The histological findings revealed the intratracheal mass to be composed of benign thyroid tissue with nodular hyperplasia. After surgery, no pulmonary symptoms were evident. This case suggested the effect of pregnancy on thyroid tissue stimulatied due to a combination of an increasing human chorionic gonadotropin(hCG) level and relative iodine deficiency during pregnancy. This is the first report on the detection of intratracheal ectopic thyroid tissue during pregnancy in Korea.
Key Words: Intratracheal ectopic thyroid, Pregnancy, Airway obstruction

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