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目的 :评价MRI对脑胶质肉瘤的诊断价值。方法 :经病理证实的脑胶质肉瘤 6例 ,回顾分析其MRI表现。结果 :病灶基本上表现为长T1、长T2 信号 ,边界清楚 ,多数形态不规则 ,伴有囊变和坏死 ,可伴瘤内出血 ,生长具有侵袭性 ;少数为结节状。周围脑组织水肿 ,占位效应明显。增强扫描 :6例均明显强化 ,4例呈不规则环状强化 ,2例呈结节状强化 ;2例直接侵犯邻近脑叶 ,2例发现脑内转移灶。结论 :脑胶质肉瘤通常发生于额、顶叶 ,MRI能够清楚地显示病变 ,但信号改变易与多形胶质母细胞瘤、恶性胶质瘤、转移瘤等相混淆。确诊仍依赖于组织病理学诊断。
Objective: To evaluate the diagnostic value of MRI for glioma. Methods: 6 cases of glioma confirmed by pathology were retrospectively analyzed. Results: The lesions showed basically long T1 and long T2 signals with clear boundary, most of them were irregular in shape, with cystic degeneration and necrosis, which could be associated with intratumoral hemorrhage and invasive growth. A few were nodules. Peripheral brain tissue edema, mass effect is obvious. Enhanced scanning: 6 cases were significantly enhanced, 4 cases showed irregular ring enhancement, 2 cases showed nodular enhancement; 2 cases of direct invasion of adjacent brain lobes, 2 cases of brain metastases were found. Conclusion: Glial sarcoma usually occurs in the frontal and parietal lobes. MRI can clearly show the lesion. However, the change of signal is easily confused with glioblastoma, glioblastoma, metastasis and so on. Diagnosis is still dependent on histopathological diagnosis.