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MRI Representation Analysis of the Dermoid Cyst and Epidermoid Cyst Inside the Vertebral Canal<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
李明利
金征宇
石海峰
张 燕
中国医学科学院中国协和医科大学
北京协和医院放射科100730
Mingli Li Zhengyu Jin Haifeng Shi Yan Zhang
Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
ABSTRACT
Object: to evaluate the characters of intraspinal Epidermoid and dermoid cysts on MRI.
Methods: the MRI imagings of 11 patients with Intraspinal Epidermoid (n=9)and dermoid cysts(n=2) including 3 recurring cases as well,which were confirmed with operation and pathology, were anakyzed retrospectively.
Result: All of the lesions were found in the lower lumbar region,locate at the conus and cauda equina,and had typical shape and well-defined border to the normal spinal on MRI.10 lesions showed heterogeneous signal intensity composed in iso-,hypo- and hyperintensity except that one lesion had iso-intensity on T1WI.All of the lesion were iso- to slightly hypointensity compared to CSF on T2WI.It also cound be found the iso- to hypointensity in the tumors on T2WI.No enhencement were detected in the cyst after adminstration of Gd-DTPA in the three cases.It was almost the similar charaters ad its original lesion in the three recurring tumor on MRI.
Conclusion: MRI is powerful tool to assess the lesions of intrspinal epidermoid and dermoid cysts.
Key words: Intraspinal cyst;Epidermoids; Dermoids; MRI
椎管内畸胎类肿瘤少见，主要是表皮样囊肿和皮样囊肿，发病率占椎管肿瘤的1％～2％[1]; 畸胎瘤则十分罕见。此类肿瘤的诊断主要靠MRI。由于肿瘤的MRI表现复杂，加之认识不够，术前常不能作出准确的定性诊断。本研究总结分析了经手术病理证实的9例表皮样囊肿和2例皮样囊肿的MRI表现，并与手术病理进行了对照分析。 | 
