鞍区生殖细胞瘤CT、MRI表现  

CT and MRI findings of sellar germinoma

作　　者：唐肇普[1] 白人驹[2] 

机构地区：[1]第三军医大学大坪医院野战外科研究所影像诊断科,重庆400042 [2]天津医科大学总医院,天津300052

出　　处：《中国医学影像技术》2005年第4期548-550,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的　探讨鞍区生殖细胞瘤的CT和MRI表现。方法　选择过去10年经病理或临床证实的13 例鞍区生殖细胞瘤患者作为研究对象,回顾性分析其治疗前CT和MR图像。结果　13例患者均表现为垂体柄增粗达16 mm以上和垂体后叶正常短T1高信号消失,其中12例有中枢性尿崩症。MR图像上10例肿瘤呈等T1信号,但在T2WI上信号表现为多样性。肿瘤囊变6例,其中5例可见肿瘤延伸入第三脑室。CT平扫图像显示所有肿瘤均无钙化,11 例肿瘤实体部分表现为高密度。结论　鞍区生殖细胞瘤的影像学特征表现为:CT平扫呈高密度,钙化少见;MRI为垂体柄增粗,垂体后叶短T1高信号消失。Objective To explore CT and MRI appearance of sellar germinomas. Methods Thirteen patients with sellar germinoma confirmed histologically or clinically over past ten years were selected as the object of this study. Their CT and MR images before treatment were analyzed retrospectively. Results Thickness of pituitary stalk (up to 16 mm) and absence of the hyperintensity of the posterior pituitary on T1WI were observed in all 13 cases and 12 of the 13 displayed central diabetes insipidus. Ten germinomas were isointense on T1WI, but variable intensities were exhibited on T2WI. MR images revealed intratumoral cysts in six cases, and in 5 cases of which the lesions extended into third ventricle. Eleven of the 13 cases revealed hyperdense solid components on unenhanced CT. Calcification was absent in all cases. Conclusion Hyperdensity on unenhanced CT, lack of calcification, thickness of pituitary stalk and absence of the posterior pituitary high signal on T1WI are imaging features of sellar germinoma.

关 键 词：生殖细胞瘤 体层摄影术 X线计算机 磁共振成像 脑肿瘤 

分 类 号：R739.41[医药卫生—肿瘤] R445.2[医药卫生—临床医学]