脑实质室管膜瘤CT及MRI表现

目的分析脑实质室管膜瘤的CT及MRI表现，提高对该病的认识。方法回顾性分析16例经手术和病理证实脑实质室管膜瘤的CT、MRI资料（16例中男4例，女12例，年龄29～63岁，中位年龄50岁），分析其病变部位、形态、与脑室关系、水肿情况及影像学特点。结果肿瘤12例位于幕上，4例位于幕下；12例呈囊实性，4例呈实性；16例均形态不规则，边界清楚，体积多较大，周围水肿不明显；8例肿瘤内可见钙化。CT扫描呈不均匀混杂密度，MRI扫描呈不均质混杂信号。增强扫描病变实性部分可见不均匀中度或明显强化，4例病灶呈显著多环样不规则强化。结论脑实质室管膜瘤具有一定的影像学特征，CT和MR检查可以准确显示肿瘤累及的范围，为临床制定治疗策略提供客观依据。

CT and MRI manifestations of intracerebral ependymoma

Objective To determine the CT and MRI appearance of intracerebral ependymoma. Methods CT and MRI of 16 patients （4 men and 12 women, age range ： 29- 63 years, median： 50 years） with histologically confirmed intraeerebral ependymomas were analyzed retrospectively. Results The tumors were supratentorial （12） or infratentorial （4）, mixed solid and cystic （12） or solid （4）. All 16 lesions were large and irregular with well-defined borders and no surrounding edema. Calcifications were shown in 8 cases. The tumors were heterogeneous on both CT and MRI with calcifications in 8 patients, heterogeneous intermediate to marked contrast enhancement. Conclusions The CT and MRI appearance of intracerebral ependymoma is specific and can provide comprehensive information for treatment planning.