脉络膜裂囊肿的MRI诊断

MRI diagnosis of choroidal fissure cyst

目的:探讨脉络膜裂囊肿的MRI诊断价值。材料和方法:回顾分析19例脉络膜裂囊肿的MRI表现,其中8例行CT检查,5例行MR增强扫描。结果:19例均位于脉络膜裂内,发生于右侧17例,发生于左侧2例;均为单发病灶;最大者20mm×28mm,最小者3mm×5mm,平均11mm×14mm。呈边界清楚的卵圆形或类圆形水样信号灶,与环池或四叠体池相连,灶周无水肿,5例MR增强扫描病例未见强化。结论:MR具有多参数、多平面成像的特点,可明确脉络膜裂囊肿的诊断,并可清楚地显示脉络膜裂,对脉络膜裂囊肿的诊断明显优于CT。

Objective： To discuss the value of MRI in the diagnosis of choroidal fissure cyst. Meterials and Methods： MRI findings of choroidal fissure cyst in 19 patients were analyzed retrospectively. Axial CT scanning had been applied in 8 cases, and 5 cases accepted further MRI enhanced scanning. Results： All lesions located at the area of choroidal fissure, 17 cases were in the right and 2 cases in the left. They all were single lesion. The size of the biggest lesion was 20mm×28mm and the smallest was 3mm×5mm. Round or long oval shape was seen on axial imaging, communicated with ambient cistern or qaudrigeminal cistern, with no associated edema. Gd-DTPA was performed in 5 cases and revealed no evidence of enhancement. Conclusion： MR imaging with multiple planes and sequences, and can see the choroidal fissure clearly. MR is better than CT in diagnosing choroidal fissure cyst.