脊髓髓内室管膜瘤和星形细胞瘤的MRI诊断15例临床分析

目的 评估脊髓髓内室管膜瘤和星形细胞瘤的MRI表现。方法 回顾分析经手术病理证实的15例室管膜瘤和10例星形细胞瘤的MRI表现。结果 两者的平扫MRI表现类似,即疾病变节段脊髓增粗,T₁WI呈低信号,边界欠清,T₂WI呈高信号。16例患者肿瘤头尾侧可见囊变。6例室管膜瘤行增强T₁WI,肿瘤实体部分都均匀强化。4例星形细胞瘤行增强T₁WI,1例肿瘤实体部分均匀强化,1例欠均匀强化,2例无强化。结论 MRI有助于两者的诊断及其鉴别诊断。

Diagnosis of intramedullary spinal cord ependymomas and astrocytomas using magnetic resonance imaging:analysis of 15 cases

Objective To evaluate the magnetic resonance imaging (MRI) featuresof intramedullary spinal cord ependymomas (INSE) and astrocytomas. Methods Retrospective analyses of the MRI images were conducted in 15 cases of INSE and 10 cases of astrocytoma. Results MRI appearances were similar in the 2 types of neoplasms, both showing enlargement of the involved spinal cord segments, low signal and blurred boundary on T_1-weighted imaging, and high signal on T_2-weighted imaging. Peritumoral cyst formation were found in 16 patients. Contrast enhancement was homogeneous in 6 cases of ependymomas and 1 of astrocytoma, heterogeneous in 1 astrocytoma case, and no enhancement in 2 astrocytoma cases. Conclusion MRI is helpful in the diagnosis and differential diagnosis of INSE and astrocytomas.