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目的探讨脑实质神经鞘瘤的MRI表现。资料与方法回顾性分析5例经手术病理证实的脑实质神经鞘瘤患者的MRI资料,并结合文献讨论。结果 5例肿瘤均位于幕上,额叶及顶叶各2例,颞叶1例;4例呈囊性伴壁结节,另1例以实质性为主;MRI增强扫描壁结节或实质部分明显强化;5例均伴有瘤周水肿。结论脑实质神经鞘瘤好发于青少年,幕上脑表浅部位多见,伴囊变和瘤周水肿是其较特征性的MRI表现,最终诊断依赖于病理组织学检查。
Objective To investigate the MRI manifestations of parenchymal schwannoma. Materials and Methods MRI data of 5 patients with brain parenchymal nerve sheath tumors confirmed by surgery and pathology were retrospectively analyzed and discussed in the literature. Results All the 5 tumors were located on the supratentorial frontal lobe, 2 in the frontal lobe and parietal lobe, 1 in the temporal lobe, 4 in the cystic nodules and 1 in the other. Some were significantly enhanced; 5 cases were accompanied by peritumoral edema. Conclusions The parenchymal schwannoma occur mostly in adolescents. The supratentorial superficial parts of the brain are more common. Cystic degeneration and peritumoral edema are more characteristic MRI manifestations. The final diagnosis depends on histopathological examination.