MR imaging manifestations of extraventricular neurocytoma / 实用放射学杂志

ABSTRACT

Objective To analyze retrospectively the MR manifestations and differential diagnosis of extraventricular neurocytoma (EVN).Methods 7 patients with EVN confirmed by pathologic examination were performed non-enhanced and contrast-enhanced MR scan,and one of them was also performed DWI.Results 4 tumors were located in cerebra,2 tumors located in cerebellum,involving both cortex and white matter,and 1 tumor was located in the seller region.5 tumors were solid-cystic lesions and 2 tumors were solid lesions.5 lesions were well demarcated and 2 lesions were ill defined.Edema around the lesion was found in 2 cases.The solid part of tumors showed iso-or hyper intensity on T1WI,hypo-or hyper intensity on T2WI.Necrosis and hemorrhage occurred in some cases.The degree of enhancement in solid part ranged from mild enhancement to intense enhancement heterogeneously.The cystic part showed ring like enhancement with a thin wall.Conclusion The manifestations of EVN on MRI have some characteristics.If a solid-cystic lesion was well defined,involving both cortex and white matter,EVN should be considered.