The MRI features of grade Ⅱ and grade Ⅲ intracranial extraventricular ependymomas
XIANG Chao, ZHANG Can, ZOU Wen-hui, CHAI Chang-zhu, SONG Ji-hua, LU Ji
Department of Radiology, The First College of Clinical Medical Science, China Three Gorges Universtiy &
Yichang Central People’s Hospital, Yichang Hubei 443000, China
Abstract Objective: To investigate the MR imaging features of intracranial extraventricular ependymoma(IEE) of grade Ⅱ and Ⅲ, and to improve the accuracy of preoperative diagnosis and classification of tumors. Methods: The clinical data, MR imaging and pathological features of 8 cases of IEE confirmed by operation and pathology were retrospectively analyzed. Results: Single lesion was found in each case, 2 cases were in frontal lobe, 1 case in temporal lobe, 3 cases in occipital lobe, 1 case in parieto-occipital lobe and 1 case in temporal-occipital lobe, of which 4 cases were grade Ⅱ and 4 cases were grade Ⅲ. Five were mainly cystic lesions and 3 were mainly solid lesions. Only 1 case of grade Ⅱ IEE was cystic, and 4 cases of grade Ⅲ IEE were cystic. Intratumoral calcifications were only found in grade Ⅱ cases(n=3). Peritumoral or intratumoral hemorrhage was only found in grade Ⅲ cases(n=2). Intratumoral flow-empty vessels and intratumoral enhanced vessels were seen in both grade Ⅱ and grade Ⅲ cases. Solid lesions and solid component in cystic lesions showed markedly inhomogeneous enhancement. The cystic walls showed ring enhancement, parts of cystic components demonstrated patchy mild enhancement. Conclusion: IEE has certain imaging features on conventional MRI. Combining with clinical data, it can improve the accuracy of preoperative diagnosis and classification.
XIANG Chao,ZHANG Can,ZOU Wen-hui, et al. The MRI features of grade Ⅱ and grade Ⅲ intracranial extraventricular ependymomas[J]. JOURNAL OF CHINA MEDICAL IMAGING, 2019, 30(9): 609-612.
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2019, Vol. 30 
