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.
向 超，张 灿，邹文辉，柴长柱，宋继华，鲁 际. Ⅱ、Ⅲ级颅内脑室外室管膜瘤的MR影像表现[J]. 中国临床医学影像杂志, 2019, 30(9): 609-612.
XIANG Chao, ZHANG Can, ZOU Wen-hui, CHAI Chang-zhu, SONG Ji-hua, LU Ji. The MRI features of grade Ⅱ and grade Ⅲ intracranial extraventricular ependymomas. JOURNAL OF CHINA MEDICAL IMAGING, 2019, 30(9): 609-612.
[1]Kim DS, Na DG, Kim KH, et al. Distinguishing Tumefactive Demyelinating Lesions from Glioma or Central Nervous System Lymphoma: Added Value of Unenhanced CT Compared with Conventional Contrast-enhanced MR Imaging[J]. Radiology, 2009, 251(2): 467-475.
[2]郑田玲，古丽给娜，哈斯木，等. 脑实质室管膜瘤的MRI表现[J]. 新疆医科大学学报，2008，31（10）：1458.
[3]曾向廷，林时勖，林黛英，等. 幕上脑实质内室管膜瘤的MR及CT诊断探讨[J]. 影像诊断与介入放射学，2005，14（3）：137-140.
[4]Liu Z, Li J, Liu Z, et al. Supratentorial cortical ependymoma: Case series and review of the literature[J]. Neuropathology, 2014, 34(3): 243-252.
[5]Lehman NL, Jorden MA, Huhn SL, et al. Cortical Ependymoma. A case report and review[J]. Pediatr Neurosurg, 2003, 39(1): 50-54.
[6]Roncaroli F, Consales A, Fioravanti A, et al. Supratentorial Cortical Ependymoma: Report of Three Cases[J]. Neurosurgery, 2005, 57(1): E192.
[7]Lehman NL. Patterns of brain infiltration and secondary structure formation in supratentorial ependymal tumors[J]. J Neuropathol Exp Neurol, 2008, 67(9): 900-910.
[8]Niazi TN, Jensen EM, Jensen RL. WHO Grade II and III supratentorial hemispheric ependymomas in adults: case series and review of treatment options[J]. J Neuro-oncol, 2009, 91(3): 323-328.
[9]Van Gompel JJ, Koeller KK, Meyer FB, et al. Cortical ependymoma: an unusual epileptogenic lesion[J]. J Neurosurg, 2011, 114(4): 1187-1194.
[10]Lee SK, Lim DJ, Kim SD. Supratentorial cortical ependymoma in a 21-month-old boy[J]. J Korean Neurosurg Soc, 2011, 50(3): 244-247.
[11]Yurt A, Selcuki M, Erturk AR, et al. Large supratentorial cortical ependymoma in a child[J]. Clin Med Res, 2010, 8(1): 25-27.
[12]Sato Y, Ochiai H, Ymakawa Y, et al. Brain surface ependymoma[J]. Neuropathology, 2000, 20(4): 315-318.
[13]鱼博浪，王世捷，张明. 幕上脑实质室管膜瘤CT和MRI诊断[J]. 中华放射学杂志，1997，31：765-769.
[14]吴越，张雪林，杨本强，等. 幕上脑实质室管膜瘤15例CT和MRI分析[J]. 中国临床医学影像杂志，2006，17（9）：481-483.
[15]徐焱，姚振威，韩芳. 幕上脑实质室管膜瘤影像表现及病理对照分析[J]. 放射学实践，2014，29（9）：1031-1034.
[16]Iwamoto N, Murai Y, Yamamoto Y, et al. Supratentorial extraventricular anaplastic ependymoma in an adult with repeated intratumoral hemorrhage[J]. Brain Tumor Pathol, 2014, 31(2): 138-143.
2019, Vol. 30 
