Jain Tarun Kumar, Meena Ram Singh, Bhatia Anmol, Sood Ashwani, Bhattacharya Anish, Mittal Bhagwant Rai
Department of Nuclear Medicine and PET, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Indian J Nucl Med. 2015 Oct-Dec;30(4):338-40. doi: 10.4103/0972-3919.164023.
Ectopic thyroid tissue (ETT) is a rare developmental anomaly of the thyroid tissue where the thyroid gland is not located in its usual position. Dual thyroid ectopia is far rarer. This case of a 5-year-old euthyroid girl with thyroglossal cyst was planned for surgery. Presurgical ultrasonography (USG) of the neck followed by thyroid scintigraphy was performed. There was absent normal thyroid gland with single ETT in neck swelling on USG. However, thyroid scintigraphy revealed two ectopic foci of thyroid tissue; one was corresponding to neck swelling, and other was superior to it at the base of the tongue along with absent eutopic thyroid gland. The repeat neck USG could demonstrate the same. The present case emphasizes that, if the thyroid gland is not visible by USG; ETT should be evaluated with thyroid scintigraphy in case of thyroid dysgenesis.
异位甲状腺组织（ETT）是一种罕见的甲状腺组织发育异常，甲状腺未位于其正常位置。双重甲状腺异位更为罕见。该病例为一名5岁甲状腺功能正常的女孩，患有甲状舌管囊肿，计划进行手术。术前对颈部进行了超声检查（USG），随后进行了甲状腺闪烁显像。超声检查显示颈部肿胀处无正常甲状腺，仅有单个异位甲状腺组织。然而，甲状腺闪烁显像显示有两个甲状腺组织异位灶；一个对应于颈部肿胀处，另一个位于舌根部其上方，且无正常位置的甲状腺。再次进行颈部超声检查也能显示相同情况。本病例强调，如果超声检查看不到甲状腺；在甲状腺发育异常的情况下，应进行甲状腺闪烁显像以评估异位甲状腺组织。
