MRI 上呈环形增强的脑膜瘤：一例罕见病例报告。
Meningioma with ring enhancement on MRI: a rare case report.
机构信息
Department of Neurosurgery, Xinqiao Hospital, Army Medical University, 400037, Chongqing, China.
出版信息
BMC Med Imaging. 2021 Feb 10;21(1):22. doi: 10.1186/s12880-021-00555-x.
BACKGROUND
Meningiomas typically manifest on magnetic resonance imaging (MRI) as iso- to hypointense on T1-weighted imaging and iso- to hyperintense on T2-weighted imaging. After contrast administration, they usually homogeneously enhance and exhibit a visible dural tail. Meningiomas with atypical findings may be misdiagnosed.
CASE PRESENTATION
We report a 50-year-old female patient with a pathologically diagnosed fibrous meningioma (World Health Organization grade I) that exhibited ring enhancement on MRI.
CONCLUSIONS
Meningiomas may rarely present with ring enhancement on MRI. The natural history and mechanisms of cystic degeneration and enhancement in the various types of meningioma require further study.
背景
脑膜瘤在磁共振成像（MRI）上通常表现为 T1 加权成像等或低信号，T2 加权成像等或高信号。对比剂给药后，它们通常均匀增强，并表现出明显的硬脑膜尾征。具有不典型表现的脑膜瘤可能会被误诊。
病例介绍
我们报告了一例 50 岁女性患者，病理诊断为纤维型脑膜瘤（世界卫生组织分级 I），MRI 显示为环状强化。
结论
脑膜瘤在 MRI 上可能很少表现为环状强化。各种类型脑膜瘤的囊变和强化的自然史和机制需要进一步研究。
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