婴幼儿阴道内胚窦瘤的CT和MRI诊断  

CT and MRI diagnosis of endodermal sinus tumor of vagina in infants

作　　者：胡悦林 刘鸿圣 罗源利 周宁 田金生 鹿连伟 

机构地区：[1]广州市妇女儿童医疗中心影像中心,510635

出　　处：《影像诊断与介入放射学》2013年第3期208-211,共4页Diagnostic Imaging & Interventional Radiology

摘　　要：目的探讨婴幼儿阴道内胚窦瘤的CT和MRI表现特点。方法回顾性分析8例经病理证实的婴幼儿阴道内胚窦瘤的CT及MRI表现,分析总结其影像学特点。结果阴道内胚窦瘤瘤体较大,多呈类圆形,CT平扫密度欠均匀,均可见坏死囊变区域。MRI检查瘤体在T_1WI序列上呈等低混杂信号,在T_2WI序列上以稍高信号为主,信号混杂不均。CT及MRI增强扫描均呈明显不均匀强化,以病灶周边强化最为显著。结论阴道内胚窦瘤的CT和MRl表现具有一定特征性,结合血清AFP显著升高,可以明确诊断。MRI在显示病灶向周围浸润程度、判断疗效及肿瘤复发方面优于CT。Objective To assess the CT and MRI features of endodermal sinus tumors of vagina in infants. Methods The CT and MRI of pathologically confirmed endodermal sinus tumors of vagina in eight infants were analyzed retrospectively. Results Endodermal sinus tumor of vagina showed a large soft tissue mass similar-circular, and the density was inhomogeneous All cases are Endodermal sinus tumor of vagina appeared as a large round soft tissue mass with heterogeneous density, variable necrosis and cystic degeneration on unenhanced CT. The tumor had heterogeneous low to intermediate T1 and slightly high T2 signal intensities. Heterogeneous enhancement especially peripherally was noted on both CT and MRI. Conclusions The CT and MRI features of heterogeneously enhancing vaginal mass with necrosis and cystic degeneration in the setting of elevated α-fetoprotcin level suggest diagnosis of endodermal sinus tumor. MRI is superior to CT in showing surrounding tumor infiltration and tumor recurrence.

关 键 词：阴道 内胚窦瘤 体层摄影术 磁共振成像 

分 类 号：R737.34[医药卫生—肿瘤]