小脑发育不良性节细胞瘤的 MRI 表现分析  

MRI manifestations of dysplastic gangliocytoma of the cerebellum

作　　者：宋燕[1] 徐红卫[1] 程敬亮[2] 晋晖[1] 谭延召[1] 

机构地区：[1]郑州大学第五附属医院放射科,河南郑州450052 [2]郑州大学第一附属医院MRI科

出　　处：《实用放射学杂志》2014年第8期1275-1278,共4页Journal of Practical Radiology

摘　　要：目的：探讨小脑发育不良性节细胞瘤（LDD）的 MRI 表现特点。方法对13例经手术病理证实为 LDD 的 MRI 表现作回顾性分析。结果13例 LDD 均位于小脑半球和小脑蚓部,MRI 表现为 T1 WI 上呈等、低信号条纹状结构,T2 WI、FLAIR 上均可见典型的“虎纹征”表现,增强后病灶出现轻度条状强化。病灶具有占位效应,四脑室及脑干示受压改变。7例磁共振波谱示 NAA轻度减低。结论 LDD 具有特征性的 MRI 表现,对术前诊断有重要价值。Objective To discuss MRI characteristics of dysplastic gangliocytoma of the cerebellum.Methods MRI manifestations of 13 cases with dysplastic gangliocytoma of the cerebellum verified by operation and pathology were analyzed retrospectively. Results All of 13 cases were located in the cerebellar hemisphere and vermis.The lesions presented striated pattern of iso-intensity signal and hypo-intensity signal on T1-weighted images.The sign of tiger stripes was the feature in dysplastic gangliocytoma on T2-weighted and FLAIR images.All of the tumors showed slightly striated enhancement after intravenous administration of contrast agent.The mass effects of dysplastic gangliocytoma of the cerebellum along with the forth ventricle and brain stem oppressed were seen in all cases.NAA was mildly reduced on magnetic resonance spectroscopy （MRS）in 7 cases of dysplastic gangliocytoma of the cerebellum.Conclusion There are distinctive manifestations in MRI images for dysplastic gangliocytoma of the cerebellum,which has crucial diagnostic value before operation.

关 键 词：发育不良性节细胞瘤 小脑 磁共振成像 

分 类 号：R739.4[医药卫生—肿瘤] R445.2[医药卫生—临床医学]