低颅压综合征的MRI表现(附5例报告)

MR Diagnosis of Intracranial Hypotension Syndrome (a report of 5 cases)

目的探讨低颅压综合征的MRI表现。资料与方法回顾性分析5例低颅压综合征的影像学表现,其中1例行头颅CT平扫、头颅和脊柱MRI平扫及增强扫描、头颅MRV扫描,3例行头颅MRI平扫及增强扫描,1例行脊柱MRI平扫及增强扫描。结果1例头颅CT扫描未见异常。4例头颅MRI扫描均显示硬脑膜弥漫性增厚并明显强化,1例出现脑下垂。1例头颅MRV显示上矢状窦、直窦、横窦扩张。2例脊柱MRI扫描显示硬脊膜广泛增厚并明显强化。结论硬脑(脊)膜弥漫性增厚强化是低颅压综合征的特征性影像学表现,MRI增强扫描是诊断低颅压综合征的敏感影像学检查方法。

Objective To discuss the MRI findings of intracranial hypotension syndrome（HIS）. Materials and Methods hnaging findings of 5 cases with IHS were retrospectively analyzed. Among them, brain plain CT scanning, pre and post contrast brain and spinal MRI scanning and brain MRV scanning were performed in 1 case. Pre and post contrast brain MRI scanning were performed in 3 cases. Pre and post contrast spinal MRI scanning was performed in 1 case. Results The CT findings of 1 case were normal. Diffuse thickening and obvious enhancement of cerebral dura in 4 cases on brain MRI scanning were found and downward sagging of brain in 1 case was dipicted. Expansion of superior sagittal sinus, straight sinus and transverse sinus were found in 1 case on MRV. Diffuse thickening and obvious enhancement of spinal dura were found in 2 cases on spinal MRI scanning. Conclusion Dura diffuse thickening and enhancement are characteristic imaging manifestations of IHS. Enhanced MRI is a sensitive imaging method for diagnosis of IHS.