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The imaging diagnosis of pigmented villonodular synovitis of knee joint
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 6
- DOI:
- 10.3760/j.issn:1005-1201.2003.06.005
- Key Word:
- 滑膜炎,色素沉着绒毛结节性;膝关节;诊断显像
Abstract： 目的探讨膝关节色素沉着绒毛结节性滑膜炎(PVNS)的影像学表现.方法回顾分析9例经手术及病理证实的色素沉着绒毛结节性滑膜炎影像学资料并进行总结.9例膝关节病变均行MR检查,其中3例增强扫描;X线平片检查6例;CT平扫5例.结果 (1)X线表现:6例中关节间隙5例正常,1例增宽;股骨髁破坏1例;胫骨平台破坏4例;共9个病灶,其中7个病灶周围见硬化环.(2) CT表现:5例PVNS均显示关节腔积液;股骨髁合并胫骨平台破坏1例,胫骨平台单发或多发破坏4例,共12个病灶,所有病灶周围均见硬化环.2例合并腘窝内软组织密度肿块.(3)MRI表现:9例中弥漫型7例,局灶型2例.7例弥漫型PVNS均见关节腔积液,其中3例髌上囊积液中见低信号结节,3例前、后交叉韧带表面可见不规则增厚的低信号滑膜覆盖,6例伴有股骨髁或胫骨平台骨质破坏,共15个病灶,其中13个病灶周围绕以低信号硬化环.3例增强扫描显示增厚的滑膜和结节均明显强化.2例局灶型PVNS表现为单发性肿块伴关节腔积液.结论膝关节色素沉着绒毛结节性滑膜炎的MRI表现较CT、X线表现具有特征性,能够作出正确诊断.
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