椎管内皮样囊肿和表皮样囊肿的MRI征像分析
来源: 2005-09-06 19:34:32

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
 
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。

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