脑室型囊虫病的磁共振成像诊断

MRI Diagnosis of Intraventricular Neurocysticercosis

目的探讨MRI对脑室型囊虫病的诊断价值。资料与方法回顾性分析经临床证实的52例脑室型囊虫病的MRI表现特点。所有患者均行MRI平扫,16例同时行MRI增强扫描。32例有脑CT扫描对照。结果52例中,单纯性脑室型囊虫28例(53.8%),混合型24例(45.2%)。其中第四脑室32例,侧脑室10例和第三脑室7例,2个及2个以上脑室混合存在3例。52例共计脑室内囊性病灶77个,其中单发囊性病灶37例,多发囊性病灶15例。77个囊性病灶中,41个(53.2%)病灶内可见囊虫头节,其在T1WI上显示最清楚;头节信号在T1WI上与脑实质信号相近,而在T2WI上信号复杂,可表现为低于、等于或高于脑脊液(CSF)的信号。32例行脑CT扫描者,CT仅诊断脑室型囊虫10例。结论MRI是诊断脑室型囊虫病的首选影像学检查方法,对脑室型囊虫病的诊断优于CT。

Objective To explore the diagnostic value of magnetic resonance imaging (MRI) for intraventricular neurocysticercosis.Materials and Methods Characteristic MRI appearances of 52 patients with intraventricular neurocysticercosis verified by MRI and clinic were retrospectively analysed. All patients were performed with plain MRI scan, 16 cases were performed with enhanced MRI, MRI findings were compared with plain cerebral CT in 32 cases.Results There were two Types of 52 cases with intraventricular neurocysticercosis, including intraventricular type (28/52, 53.8%) and mixed type (24/52, 46.2%). Among of them, the fourth ventricle (n=32), the lateral ventricle (n=10) and the third ventricle (n=7). Another 3 cases were existed in more than one ventricles. There were total 77 cystic lesions of 52 cases, single and multiple intraventricular neurocysticercosis were detected in 37 and 15 patients respectively. Of all the 77 cystic lesions, 41 scolexes (41/77, 53.2%) could be well seen on T_1WI. The intensity of the scolex was similar to that of the cerebral parenchyma on T_1WI and very complicated on T_2WI, which showed hypo-, iso- or hyperintensity. Only 10 of 32 cases were diagnosed by CT scan.Conclusion MRI is the best choice and is superior to CT for the diagnosis of intraventricular neurocysticercosis.