Abstract: ［Abstract］ Objective To investigate the clinical and imaging features of primary mediastinal atypical meningioma. Methods A case of primary mediastinal atypical meningioma in our hospital was analyzed， including clinical features， laboratory test results， image findings and pathological features. Results After laboratory test and CT scan， the patient underwent mediastinal mass resection and recovered well thereafter.ConclusionThe tissue source and structure of primary mediastinal atypical meningioma is in consistent with intracranial calcified meningioma， thusthe imaging features are similar to intracranial meningioma. Familiarity with relative imaging features and pathological changes is conducive to diagnosis and differential diagnosis of this disease.

Key words: mediastinum, ectopic meningioma, atypical

摘要： ［摘要］ 目的 探讨原发性纵隔非典型脑膜瘤的临床及影像学表现。方法 分析我院一例原发性纵隔非典型脑膜瘤的临床表现、实验室检查、影像学及病理学特征，并结合文献进行回顾，总结该病的临床、病理及影像学特征。结果 患者进行实验室及影像学检查后，行纵隔肿物切除术，术后恢复良好。结论 原发性纵隔非典型脑膜瘤的组织来源及结构与颅内钙化型脑膜瘤一致，故有脑膜瘤的影像学特征，熟悉其影像学特征及病理改变，有助于对该病的诊断及鉴别诊断。

关键词: 异位脑膜瘤, 非典型, 纵隔