MRI Features of Dysembryoplastic Neuroepithelial Tumors

VernacularTitle:胚胎发育不良性神经上皮瘤MRI表现
Author: Jihua LI ; Guoyun CHEN ; Zhihong DENG ; Yanli LI
Publication Type:Journal Article
Keywords: brain; MR imaging; dysembryoplastic neuroepithelial tumor
From: Journal of Practical Radiology 2010;26(2):161-163
CountryChina
Language:Chinese
Abstract: Objective To study MR imaging features of dysembryoplastic neuroepithelial tumors (DNET). Methods MRI ap-pearances of 10 patients with surgery and pathology proved DNET were analyzed retrospectively. All of 10 patients underwent routine and contrast-enhanced MRI. Results All lesions were located in the regions near the surface of brain,including frontal lobe (4 ca-ses) ,parietal lobe (4 cases),temporal lobe (1 case) and parietoinsular lobe (1 case). The lesions appeared as sector in 4 cases, re-versed triangle in 4 cases,irregularity in 2 cases. Homogeneous or heterogeneous long T_1 and long Tz signal intensity were seen on MR imaging. The lesion showed predominant cystic component and septa, no obvious mass effect and peritumoral edema could be found in all cases. Bone thinning of the adjacent calvaria could be seen in 6 cases. On post contrast MRI scan,the lesions had no obvi-ous enhancement in 6 cases ,while mild enhancement could be found in the intra-tumorous solid nodule or septations in 4 cases. Conclusion DNETs are of certain clinical manifestations and MRI features,it is helpful for preoperative diagnosis of DNET.