| 潘豪,刘斌,钱银锋,王海宝.对比观察髓内室管膜瘤及星形细胞瘤的MRI特征[J].中国医学影像技术,2011,27(10):1993~1996 |
| 对比观察髓内室管膜瘤及星形细胞瘤的MRI特征 |
| Comparative observation on MRI features of intramedullary ependymoma and astrocytoma |
| 投稿时间：2011-03-06 修订日期：2011-04-20 |
| DOI： |
| 中文关键词: 室管膜瘤 星形细胞瘤 脊髓肿瘤 磁共振成像 |
| 英文关键词:Ependymoma Astrocytoma Spinal cord neoplasms Magnetic resonance imaging |
| 基金项目: |
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| 中文摘要: |
| 目的 对比观察髓内室管膜瘤及星形细胞瘤的MRI特征,以提高诊断准确率。 方法 回顾性分析经手术病理证实的28例髓内室管膜瘤及12例星形细胞瘤的MRI及相关临床资料,对比分析二者MRI表现的差异。 结果 髓内室管膜瘤及星形细胞瘤的平扫MRI信号类似,T1WI呈等或低信号,T2WI以不均匀高信号为主。28例髓内室管膜瘤中,中心性膨胀性生长26例,边界清楚18例,21例可见瘤内及瘤周囊变,明显强化21例,均匀强化19例,4例出现"帽征"; 12例星形细胞瘤中,偏心性生长9例,边界不清9例,出现囊变5例,轻度强化8例,以斑片状及结节状强化为主。二者生长方式、肿瘤边界、强化程度及方式差异存在统计学意义(P<0.05)。 结论 MRI有助于鉴别诊断髓内室管膜瘤和星形细胞瘤。 |
| 英文摘要: |
| Objective To improve the diagnostic accuracy by comparative observation on MRI features of intramedullary ependymoma and astrocytoma. Methods MRI and clinical data of 40 patients (28 with intramedullary ependymomas and 12 with intramedullary astrocytomas) confirmed by pathology were analyzed retrospectively. MRI features were compared between the two diseases. Results The signal of intramedullary ependymoma and astrocytoma on plain MRI were similar, which showed iso- or hypo-intensity on T1WI and heterogeneous hyper-intensity on T2WI. Among 28 cases of intramedullary ependymomas, 26 were found with expansive growth surrounding the cord, 18 with clear boundary, 21 with cysts in tumors or adjacent to tumors. Significant enhancement happened in 21 cases of intramedullary ependymomas, homogeneous enhancement happened in 19 cases, and "cap sign" was found in 4 cases. Among 12 cases of intramedullary astrocytomas, eccentric growth was noticed in 9 cases, 9 cases were found with unclear boundary, 5 cases with visible cysts, and mild enhancement was found in 8 cases, mainly with patchy and nodular enhancement. There were significant differences in the growth pattern, border, degree and manner of enhancement between the two tumors (P<0.05). Conclusion MRI features are helpful to differential diagnosis between intramedullary ependymomas and astrocytomas. |
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