多层螺旋CT在诊断甲状腺微灶癌中的价值

目的探讨甲状腺微灶癌的多层螺旋CT影像学表现。方法回顾性分析东莞康华医院23例经手术证实的甲状腺微灶癌的MSCT表现,观察病灶分布、周围侵犯、钙化、淋巴结转移及强化特点。均行MSCT平扫及增强扫描。结果肿瘤均侵及一叶,呈低密度小结节,位于甲状腺包膜下,部分病灶侵犯包膜,合并钙化者7例,表现为点状及沙粒样钙化。增强扫描后呈条片状及结节样不均匀强化。CT平扫时肿块的CT值多小于56Hu;增强扫描后达峰时间较晚,峰值较低,多数小于100Hu。结论 MSCT有助于甲状腺微灶癌的诊断及鉴别诊断。

Objective To investigate the multi-slice CT （MSCT）characteristics of thyroid microcarcinoma.Methods The CT findings of 23 cases of pathologically confirmed thyroid microcarcinomas were analyzed.Lesions around the distribution,invasion,calcification,lymph node metastasis and enhanced features were observed. All patients underwent MSCT plain scan and enhanced scan.Results In all 23 cases,tumor had invaded unilateral lobe of thyroid. The lesions showed irregular low density nodules,located in the thyroid capsule,capsule involving,7cases with calciifcation,which showed punctate and microcalciifcation. After enhanced scanning tumor showed lfaky and nodular inhomogeneous enhancement. The plain CT scan of TMC showed CT values were less than 56Hu; Comparing normal thyroid tissue compared to strengthen,thyroid adenoma and nodular goiter,TMC showed a late peak time and the peak CT value is low,the majority of less than 100Hu.Conclusion MSCT may facilitate the diagnosis and differential diagnosiS of TMC.