脉络膜裂囊肿的影像学诊断  

Imaging diagnosis of choroidal fissure cyst

作　　者：芮春朵[1] 沈海林[2] 

机构地区：[1]江苏省宜兴市人民医院放射科,江苏宜兴214200 [2]苏州大学附属第一医院影像中心,江苏苏州215006

出　　处：《中国神经肿瘤杂志》2012年第2期113-116,共4页Chinese Journal of Neuro-Oncology

摘　　要：背景与目的:脑部脉络膜裂囊肿属神经上皮性囊肿,临床上不常见。本文通过探讨脉络膜裂囊肿的影像学表现,以期提高对本病的诊断及鉴别诊断水平。方法:回顾性分析20例CT和MRI诊断为脉络膜裂囊肿患者的临床及影像学资料。患者均行CT和MRI检查,其中增强扫描5例。结果:20例患者均为单发病灶,其中右侧13例,左侧7例,病灶均位于两侧脉络膜裂区。CT表现为圆形或类圆形、边缘光滑的脑脊液样低密度灶,增强扫描无强化。MRI检查表现为长T1长T2脑脊液样信号灶,FLAIR为低信号,在各扫描序列中完全与脑脊液信号同步,病灶周围脑实质无明显异常表现。结论:正确认识脉络膜裂囊肿的影像学表现,可避免误诊。CT和MRI均可检出脉络膜裂囊肿,但单纯CT检出定位困难,MRI多方位扫描可作出明确诊断并能够与其他囊性病变相鉴别。BACKGROUND ＆ OBJECTIVE： Choroidal fissure cyst is not common in clinics. In this study, we presented and discussed the imaging features of ehoroidal fissure cyst. METHODS： Imaging of 20 cases of Choroidal fissure cyst were znalyzed. All patients were scanned with CT and MRI and 5 cases were scanned with enhancement. RESULTS： Choroidal fissure cyst presented as single unilateral lesion in 20 cases, including 13 cases in fight and 7 cases in left. All lesions of 20 cases were located at the area of choroidal fissure. On CT scan, the lesions were shown round or ellipsoid foci with sharpmargins and homogeneous loe density. All lesions were not enhanced. On MRI,the lesions showed hypointensity on T1WI and hyperintensity on T2WI, cyst speared hypointensity in FLAIR sequence, homogenous signal intensity was identical to CSF on all sequences, and no associated edema was found in the adjacent area. CONCLUSION： The ehoroidal fissure cyst could be detected on both CT and MRI. But only CT scan alone is limited because the cyst simulates intraparenchymal cystic lesions on CT axial images. Multi- direction MRI scan can make the correct diagnosis and differentiate from other cystic lesions.

关 键 词：脉络膜裂 囊肿 X线计算机断层扫描 磁共振成像 

分 类 号：R739.41[医药卫生—肿瘤]