MRI findings of tanycytic ependymoma in central nervous system
10.3969/j.issn.1002-1671.2017.01.005
- VernacularTitle:中枢神经系统伸长细胞型室管膜瘤的MR I表现
- Author:
Shengjun SUN
- Keywords:
tanycytic ependymoma;
magnetic resonance imaging;
central nervous system
- From:
Journal of Practical Radiology
2017;33(1):16-19
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study MRI features of tanycytic ependymoma (TE)in central nervous system,to improve the further understanding of this rare tumor.Methods 26 cases with TE of central nervous system proved by pathology and surgery were analyzed retrospectively in terms of location,size,signal intensity,the presence or absence cyst,hemorrhage,“cap sign”,syringes,edema, implantation metastasis and enhancement pattern etc.Results In 26 cases,2 cases were located in the left frontal lobe,with macro-cyst and micro-nodules,and the left ventricle was interlinked.The signal of cystic region was similar to CSF,and nodule-regions were a bit iso-intensity signal on T1 WI and hypo-intensity on T2 WI with significantly enhanced.The other 24 cases were located in the spinal cord,in which 1 6 cases were in the cervical and thoracic cord.1 case of cystic masses had hemorrhagic fluid level,the others were solid masses with iso-intensity signal on T1 WI and iso or bit hyper-intensity signal on T2 WI,in which 4 cases with hypo-intensity signal on T2 WI and cystic were seen frequently,cystic were common,and 6 cases with “cap sign”.Most of masses were medium enhanced and 1 2 cases were well-defined.1 3 cases with syringomyelia and 1 case with the medulla oblongata and cerebellum implantation.The lesions located in thoracic and lumbar cord in 8 cases with iso-intensity signal on T1 WI and iso or bit hyper-intensity signal on T2 WI, in which 4 cases were hypo-intensity signal on T2 WI,and 3 cases showed small round cystic changes,and 1 case showed syringomyelia and no “cap sign”.8 cases were medium enhanced.Conclusion TE in central nervous system shows characteristic manifestations on MRI,which are helpful in differential diagnosis and guide for treatment.
