非脑膜瘤病变致硬脑膜异常强化的MRI分析

MR1 analysis of abnormal dural enhancement due to non - meningioma diseases

目的分析非脑膜瘤病变致硬脑膜异常强化的MRI表现及MRI增强扫描在硬脑膜病变中的诊断价值。方法对MRI增强扫描显示硬脑膜异常强化的32例病人进行回顾性分析，硬脑膜转移癌22例，脑脓肿4例，低颅压综合征4例，鼻窦霉菌感染侵入前颅窝、颅骨嗜酸性肉芽肿各1例，32例病人均行MRI平扫及增强扫描。结果MRI平扫发现硬脑膜异常改变5例，均表现为硬脑膜线样增厚，其中4例为全硬脑膜均匀弥漫增厚，1例为右顶部硬脑膜不均匀增厚。MRI增强检查，32例病例均出现硬脑膜的线样增厚和强化，其中15例均匀增厚和强化，17例不均匀增厚，呈“鼠尾”样强化。结论MRI增强扫描是检出硬脑膜病变的重要方法，明显优于平扫。

Objective To analysis MRI manifestations of abnormal dural enhancement due to non -meningioma diseases, and to evaluate MRI diagnostic value of dural disease. Methods Enhancement features in 32 cases with abnormal dural enhancement on MRI were retrospectively analysed. There were 22 patients with dural metastasis, abcess of brain in 4 cases, intracranial hypotention syndrome in 4 cases, fungus infection of paranasal sinus in 1 case, eosinophilic granuloma in 1 case. Thirty -two patients were examined by plain and contrast MRI. Results On MRI plain scan, Abnormal dural changes were found in 5 cases and showed linear thickening,including homogenous thicking of all dural in 4 cases and non - homogenous thicking of right frontal dural in 1 case, after MRI enhanced examination, all cases were showed linear thieking and enhancement, 15 cases were showed homogenous thicking and enhancement,17 cases were showed non- homogenous thicking and enhanced like dural tail. Conclusions Post -contrast MRI scan is an important tool for dural disease, and is superior to MRI plain scan.