脑节细胞胶质瘤的MRI表现及鉴别诊断

目的 探讨脑节细胞胶质瘤的MRI表现特点。方法 回顾性分析24例经手术病理证实的脑节细胞胶质瘤患者的MR图像,其中男14例,女10例。全部病例均接受MR平扫,获得T1WI、T2WI及FLAIR图像,20例接受增强扫描。分析MRI特点。结果 病灶位于大脑半球者21例,最常见于颞叶,小脑半球3例。病灶直径平均28.7 mm。囊性病灶4例,囊实性病灶11例,实性病灶9例。病灶的囊性成分呈长T1、T2信号,FLAIR低信号;实性成分呈等或稍长T1、长T2信号,FLAIR高信号。19例病灶无水肿或轻度水肿。14例病灶呈斑片状或结节状不同程度强化。结论 根据脑节细胞胶质瘤的MRI表现,结合临床,对部分病例可以作出诊断。

MRI features and differential diagnosis of cerebral ganglioglioma

Objective To investigate the MRI features of cerebral ganglioglioma. Methods Twenty-four patients, including 14 male and 10 female with cerebral ganglioglioma confirmed by operation and histopathologic examination were reviewed retrospectively. Pre-contrast MR scan was performed in 24 patients. T1WI, T2WI and fluid attenuated inversion recovery (FLAIR) images were obtained. Twenty patients underwent dynamic contrast-enhanced MR scan. Results Lesions of 21 patients were found in the supratentorial hemispheres, the rest 3 in the cerebellum. The temporal lobe was the most common tumor location. The mean diameter of tumor was 28.7 mm. MRI demonstrated cystic mass in 4 patients, cystic-solid tumor in 11 and solid tumor in 9. Cystic components showed hypointensity on T1WI, hyperintensity on T2WI and hypointensity on FLAIR. Solid components showed iso- or slight hypointensity on T1WI, hyperintensity on T2WI and FLAIR. No or mild peritumoral edema was found in 19 patients. Patchy or nodular enhancement was seen in 14 patients on post-contrast MRI. Conclusion Some cases of cerebral ganglioglioma can be diagnosed according to MRI findings and clinical manifestation.