暗带征对包膜期脑脓肿的诊断价值

Value of “low-signal zone” sign in the diagnosis ofbrain abscess in the capsule period

目的 :探讨暗带征对包膜期脑脓肿的诊断与鉴别诊断价值。方法 :对 2 1例包膜期脑脓肿和 2 5例囊性星形细胞瘤治疗前行MRI扫描 ,分析包膜期脑脓肿暗带征的病理基础 ,比较两类疾病暗带征的出现率及不同形态。结果 :包膜期脑脓肿的暗带征出现率为 85 .7% (1 8/ 2 1 ) ,高于囊性星形细胞瘤的 5 2 .0 % (1 3/ 2 5 ) ,前者的暗带多完整 ,后者的暗带多不完整。结论 :“暗带”

Objective To evaluate the value of “low signal zone” sign in the diagnosis of brain abscess in the capsule period.Methods The conventional MRI was performed pre therapy in 21 patients with brain abscess in the capsule period and 25 patients with vesica astrocytomas. We analyzed the pathologic basis of “low signal zone” sign in brain abscess and compared the frequency and shape of “low signal zone” sign in brain abscess and vesica astrocytomas. Results The “low signal zone” sign in MRI occurred more frequently in brain abscess (85.7%,18/21) than in vesica astrocytomas (52.0%,13/25). The “low signal zone” sign in the former was intact, while that in the latter was not.Conclusion The “low signal zone” sign is helpful to diagnose brain abscess in the capsule period, and is valuable to differentiate brain abscess and vesica astrocytomas.