MRI appearance of dysembryoplastic neuroepithelial tumor
10.3760/cma.j.issn.1671-8925.2011.01.021
- VernacularTitle:胚胎发育不良性神经上皮肿瘤的MRI表现
- Author:
Shuo-Guo XU
1
;
Wen LIANG
;
Hong-Shun JIA
;
Zheng-Bing ZHU
;
Jiang-Ming YANG
;
Xian-Yue QUAN
Author Information
1. 南方医科大学珠江医院
- Keywords:
Tumor,neuroepithelium;
MRI;
Brain tumor
- From:
Chinese Journal of Neuromedicine
2011;10(1):84-87
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the MRI appearance and clinical features of dysembryoplastic neuroepithelial tumor (DNT) to improve accurate diagnosis of DNT. Methods The clinical data and MRI appearance of 12 patients with DNT confirmed by surgery and pathology were analyzed retrospectively. Routine MRI was performed in all of the 12 patients, and also dynamic contrast-enhanced MR imaging in 10 of them. Results Eight lesions resided in the temporal lobes, 2in the frontal lobe, and the other 2 in the parietal lobe. All of the 12 DNTs located in supratentorial hemisphere cortex, and 6 of them encroached the adjacent white matter. The lesions appeared as hypointense or iso-hypointense signal on T1WI of MRI, and hyperintense on T2WI and FLAIR of MRI.Cystic structure was shown in all the lesions or as its main part, and mesh-separated structure was also noted in some of the tumors. Five lesions appeared as a triangle in shape, 5 in gyrus-like shape and the remaining 2 in round shape. All the tumors had no significant mass effect with 1 having mild edema around the tumor. Enhanced MR imaging showed only 1 lesion having slight and heterogeneous enhancement. Conclusion DNT is accorded with general tumor's biological characteristics. MRI has great value on DNT's diagnosis. If a cystic lesion locates in the hemisphere cortex with a triangle in shape or gyrus-like shape, having no significant mass effect and peripheral edema, it has a great possibility of being DNT.
