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目的探讨胚胎发育不良性神经上皮瘤(DNET)的MRI表现。方法回顾性分析5例经手术病理证实的DNET患者的MRI资料。结果MRI检查4例病灶位于幕上结构,其中颞叶2例,额叶1例,同时累及额叶、岛叶、颞叶1例。1例病变位于小脑和脑干,向下累及第3颈髓水平。病灶主要累及皮层,以囊性成分为主,在T1W呈等低信号,在T2W呈高信号,内有分隔,增强扫描病灶实质部分和分隔不强化或轻度强化,病灶周围均未见水肿。幕上病变多呈倒三角征。结论DNET的MRI表现较具特征性,MRI有助于术前正确诊断。
Objective To investigate the MRI findings of embryonic dysplastic neuroepithelioma (DNET). Methods The MRI data of 5 patients with pathologically confirmed DNET were retrospectively analyzed. Results Four lesions were located on the supratentorial structure. There were 2 cases of temporal lobe, 1 case of frontal lobe, and 1 case of frontal lobe, insula and temporal lobe. One of the lesions was located in the cerebellum and brain stem, involving the third cervical cord downwards. Lesions mainly involving the cortex, cystic components mainly showed low signal in T1W, high signal in T2W, there is separation, enhanced scan the real part of the lesion and separation is not enhanced or mild enhancement, no edema around the lesion. Curtain lesions were inverted triangle sign. Conclusion DNET MRI performance more characteristic, MRI help to correct diagnosis before operation.