免疫抑制状态下并发脑脓肿的MRI表现

MRI Features of Brain Abscess in Immuno-compromised Patients

目的探讨免疫抑制状态下并发脑脓肿的MRI表现。方法回顾性分析7例免疫抑制并发脑脓肿的MRI表现,常规行T1WI、T2WI和增强扫描。结果7例患者共发现50个小脓肿灶,其中位于额叶10个,顶叶17个、枕叶9个、颞叶8个、丘脑1个,小脑5个。主要MRI表现为脑内多发类圆形病灶,位置较深,T1WI呈等、低信号,T2WI呈高信号,较大病灶周边有轻度水肿,Gd-DTPA增强扫描示病灶呈小环状强化,壁薄、光滑。结论免疫抑制状态下并发脑脓肿的MRI表现具有一定特征性。

Objective：To investigate the magnetic resonance imaging （MRI） features of brain abscess in patients with immuno-suppression. Methods ： The MRI findings of brain abscess in 7 patients with immuno-suppression were analyzed retrospectively. Results： 50 leisons has been found, 10 in frontal lobe, 17 in parietal lobe, 9 in occipital lobe,8 in temporal lobe, 1 in cerebral ganglion and 5 in cerebellum. All patients displayed multiple, round shaped,deeply seated intra-cranial lesions, which showed hypo-intensity on T1WI and hyper-intensity on T2WI. Mild peripheral edema could be assessed in large lesions. After intravenous administration of Gd-DTPA, well-defined, narrow ring-like enhancement was showed. Conclusion： Characteristic MRI features can be revealed in immuno-compromised patients with brain abscess.