| 杨本涛,刘淑玲,王振常,董薇,王永哲,鲜军舫,戴皓洁.舌根异位甲状腺的CT和MRI表现[J].中国医学影像技术,2009,25(11):1996~1999 |
| 舌根异位甲状腺的CT和MRI表现 |
| CT and MRI findings of lingual thyroid |
| 投稿时间：2009-05-04 修订日期：2009-07-04 |
| DOI： |
| 中文关键词: 舌甲状腺 体层摄影术,X线计算机 磁共振成像 |
| 英文关键词:Lingual thyroid Tomography, X-ray computed Magnetic resonance imaging |
| 基金项目: |
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| 中文摘要: |
| 目的 探讨舌根异位甲状腺的CT和MRI表现。 方法 回顾性分析8例经核素扫描或手术证实的舌根异位甲状腺患者的CT或MRI资料,其中6例接受颈部CT检查,2例接受颈部MR检查。 结果 8例病灶均位于舌根中线区,6例呈类圆形,2例呈分叶状,边界清楚,最大径16~36 mm,平均24 mm。与舌根肌肉比较,2例CT平扫呈高密度,其中1例密度不均匀;5例增强后明显强化,其中2例病灶内有散在的小囊状低密度区;3例病变密度不均匀,结合其他检查考虑伴发结节状甲状腺肿,其中1例经病理证实。2例MR T1WI、T2WI均呈较高信号,增强后明显强化,病变信号较均匀。颈部均未发现正常位置的甲状腺。 结论 舌根中线区高密度或高信号并明显强化的结节是舌根异位甲状腺的特征性影像学表现,密度或信号不均匀常提示其发生病变;结合颈部无正常位置甲状腺,比较容易作出诊断。 |
| 英文摘要: |
| Objective To observe CT and MRI findings of ectopic thyroid gland (ETG) at the base of the tongue (lingual thyroid). Methods Eight patients of ETG at the base of the tongue were verified with thyroid scintigraphy or surgery. Six patients underwent neck CT and 2 patients underwent neck MRI, their CT and MRI features were analyzed retrospectively. Results Eight lesions occurred in the midline of tongue base with well-defined margin, 6 showed oval shape, and 2 having lobular shape. The maximum diameter of the lesions ranged from 16 to 36 mm (mean 24 mm). On plain CT scanning, the lesions appeared as homogeneous and heterogeneous hyperdense masses relative to tongue muscle in one patient. On contrast enhanced CT, homogeneous marked enhancement was found in 3 patients, while heterogeneous marked enhancement was detected in 2 patients. Combined with findings of other examinations, three ETGs with inhomogeneous attenuation were possibly associated with nodular goiter, one of which was confirmed by pathology. On MR T1WI and T2WI, the lesions revealed homogeneous hyperintense signal compared to tongue muscle in 2 patients with marked enhancement after the administration of contrast material. No orthotopic thyroid in the neck was detected with CT or MRI. Conclusion High attenuation or hyperintense mass with marked enhancement in the midline of tongue base are typical manifestations of ETG. ETG accompanying with lesion should be suspected in patient with inhomogeneous focus within mass on CT or MRI. Absence of orthotopic thyroid is helpful to the diagnosis of ETG. |
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