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异位甲状腺(ectopic thyroid)可发生在舌根部至上纵膈之间.较多见者为胸骨后甲状腺(甲状腺位置低,部分延伸至胸骨后)、气管前甲状腺、舌根甲状腺.发生在舌根部的异位甲状腺简称为舌甲状腺,它可以是体内唯一之甲状腺组织.在口腔科诊断和处理上应特别持慎重态度.报导一例如下:
Ectopic thyroid (ectopic thyroid) can occur between the base of the tongue and the supramediastinum. The more common is the retrosternal thyroid gland (low thyroid gland, partially extending to the sternum), pretracheal thyroid gland, and tongue thyroid gland. Occurs at the base of the tongue. Ectopic thyroid is abbreviated as tongue thyroid. It can be the only thyroid tissue in the body. It should be particularly cautious in diagnosis and treatment of dentistry. An example of report is as follows: