颅内结核的MRI诊断

目的：探讨MRI对颅内结核的诊断价值。方法：回顾性地分析11例经手术或活检病理证实的颅内结核病例资料和MRI表现，其中结核性脑膜炎5例，颅内结核瘤4例，颅内结核瘤并脑膜炎2例。结果：结核性脑膜炎的MRI主要表现为脑梗塞、脑积水，脑膜及脑基底池的异常增强等。结核瘤MRI可表现为占位、脑水肿，可见钙化，在T2WI上呈低信号以及环形或结节状的异常增强为其特征表现。结论：MRI在诊断颅内结核方面有比较特征性的表现。具有重要的诊断价值。

MRI diagnosis in intracranial tuberculosis

Objective: To assess the diagnostic value in intracranial tuberculosis with MR. Methods: MR images of 11 patients with surgically and histologically proved intracranial tuberculosis were reviewed respectively. They included 5 cases of tuberculous meningitis: 4 cases tuberculoma; 2 cases tuberculoma combined with meningitis. Results: The MR imaging features of tuberculosis are cerebral infarction and hydrocephalus, distention of the affected subarachnoid spaces and abnormal meningeal enhancement and cistern enhancement after Gadolinium DTPA administration. The MR imaging features of tuberculoma showed space occupying effect, hydrocephalus and occasionally calcification. Low density on T-2 weighted images and ring or nodular contrast enhancement were considered to be its typical features. Conclusion: MRI could prove typical feature and is valuable in the diagnosis of intracranial tuberculosis.