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| The MRI manifestations and diagnostic value in primary and secondary aneurysmal bone cyst |
| DENG Min, LI Wen-bin, LI Mei, YANG Shi-xun |
| Department of Radiology, the Affiliated Six People’s Hospital of Shanghai Jiaotong University, Shanghai 200233, China |
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Abstract Objective: To analyze the MRI manifestations of aneurysmal bone cyst and to evaluate the value of its imaging diagnosis. Methods: A retrospective analysis was made on MR images of 18 patients who were pathologically proved to have primary or secondary aneurysmal bone cyst. Results: Eighteen lesions all showed expansile and lytic bony destruction(100％), and 15 lesions located in long tubular bones(83.3%), and 12 lesions were eccentric(66.7%). Among all the lesions,there were visible cortical bone defect in 11 lesions(66.1%), periosteal reaction in 2 lesions(11.1%), lobulated margin in 12 lesions(66.7%), multiple cystic spaces in 14 lesions(77.8%), internal septations in 10 lesions(55.6%), hypointense peripheral rim in 11 lesions(61.1%), fluid-fluid levels in 6 lesions(33.3%), soft tissue masses in 5 lesions(27.8%). Conclusion: ①Primary aneurysmal bone cyst showed relatively uniform MRI manifestations. Secondary aneurysmal bone cyst showed complicate and multiplex manifestations, however, most lesions showed collective MRI characters of aneurysmal bone cyst such as multiple cystic spaces and hypointense rims. ②MRI could reveal characteristic manifestations earlier and more sensitive than X-ray and CT. It is helpful to qualitative diagnosis of aneurysmal bone cyst, especially to secondary aneurysmal bone cyst. ③A comprehensive imaging analysis could improve diagnostic accuracy of aneurysmal bone cyst.
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Received: 23 August 2007
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Corresponding Authors:
LI Wen-bin
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2008, Vol. 19 
