Wang C.-Y.TIEN-CHUN CHANG2020-06-032020-06-0319950003-1348https://www.scopus.com/inward/record.uri?eid=2-s2.0-0029555022&partnerID=40&md5=2ebefde78df4ed46f8d127d142c11dd4https://scholars.lib.ntu.edu.tw/handle/123456789/496723Ectopic thyroid tissue is a rare entity. The occurrence of a thyroid carcinoma in such aberrant thyroid tissue has been reported, but is very rare. Surgical excision is considered the treatment of choice in managing the lesions associated with ectopic thyroid. If the ectopic thyroid is excised, all the thyroid may have been ablated, resulting in permanent hypothyroidism. We report two cases of ectopic thyroid in emphasizing the importance of thyroid ultrasonography and fine-needle aspiration (FNA) cytology in evaluating ectopic thyroid before surgery.[SDGs]SDG3adult; article; aspiration biopsy; cancer cytodiagnosis; cancer risk; case report; diagnostic value; echography; ectopic thyroid gland; female; human; preoperative evaluation; school child; thyroid carcinoma; Adult; Biopsy, Needle; Child; Choristoma; Female; Humans; Hypothyroidism; Postoperative Complications; Preoperative Care; Thyroglossal Cyst; Thyroid Glandjournal article74864372-s2.0-0029555022