18例脉络膜裂囊肿的磁共振表现

MR imaging diagnosis of 18 choroidal fissure cyst of the brain

目的探讨脉络膜裂囊肿的磁共振表现。方法回顾性分析18例脉络膜裂囊肿的MRI表现。结果18例囊肿均位于脉络膜裂内,均为单发病灶;最大者2.9×2.2×1.1cm,小者最大径仅0.5cm,表现为界限清楚的囊性病变,病灶周围均无水肿,MR增强扫描无强化。结论正确认识脉络膜裂囊肿的影像学表现,可避免误诊。MRI具有多平面成像的特点,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 study the MR findings of choroidal fissure cyst of the brain. Methods Char- acteristic MR findings in 18 patients with choroidal fissure cyst were retrospectively analyzed. Results The cysts were situated within the choroidal fissure in all cases, and all cases were single, with clear border, no asso- ciated edema, and no enhancment in Gd-DTPA enhanced MRI. The maximum size of cyst is 2. 9 x 2. 2 x 1.1 cm, the minimum is smaller than 0. 5 cm. Conclusion MR multiple plane scan shows the choroidal fissure clearly. MR diagnosis is better than CT on choroidal fissure cyst.