乳头状胶质神经元肿瘤的MRI及病理表现

Magnetic resonance imaging and pathological features of papillary glioneuronal tumor

  • 摘要: 目的 分析2例乳头状胶质神经元肿瘤(PGNT)同时复习文献,归纳总结其影像表现。方法 使用GE公司3.0T磁共振扫描仪对1名12岁女性及1名27岁男性PGNT患者进行MR平扫及增强扫描,分析2例患者的临床表现、MRI特点及病理特征,并对文献资料进行归纳总结。结果 2例患者临床表现为失神发作和癫痫。MRI表现为囊实性病变及囊性病变伴壁结节,增强扫描后实性部分及壁结节明显强化。2例均位于颞叶,其中1例与侧脑室关系密切。病理镜下可见特征性的假乳头结构和双相分化的神经胶质细胞及神经元。结论 PGNT的MRI表现以囊性肿块伴壁结节多见,病灶位置多靠近脑室且与脑室关系密切,脑室旁型和脑室外型的分类有助于诊断。

     

    Abstract: Objective To analyze the magnetic resonance imaging (MRI) and pathological features of papillary glioneuronal tumor (PGNT) in 2 patients and review the literature. Methods A 12-year-old female and a 27-year-old male underwent pre-and post-contrast MRI with a 3.0 T magnetic resonance scanner (GE Service). The clinical, MRI and pathological features of PGNT were analyzed. The literature was reviewed. Results The clinical symptoms include absence seizure and epilepsy. MRI showed a cystic solid mass or a cystic lesion with mural nodules. The solid component and mural nodules were enhanced markedly after contrast agent administration. Both lesions were located in the temporal lobe, one of which was closely related with the lateral ventricle.Histopathological examination revealed their characteristic pseudopapillary structure with astrocytes and neurons. Conclusion PGNT is a rare tumor of the central nerve system. MRI can reveal a cystic mass with mural nodules in most cases. PGNT is usually located near the ventricle and can be divided into para-and extra-ventricular type.

     

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