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The value of MRI in diagnosing pigmented villonodular synovitis
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 6
- DOI:
- 10.3760/j.issn:1005-1201.2003.06.003
- Key Word:
- 滑膜炎,色素绒毛结节性;磁共振成像;放射摄影术
Abstract： 目的探讨色素沉着绒毛结节性滑膜炎(pigmented villonodular synovitis , PVNS)的MRI表现.方法 23例PVNS中膝关节9例,髋关节9例,踝关节3例,肘关节1例,腕关节1例,均经手术和病理证实.23例PVNS均行X线和MR检查,其中4例行CT检查.分析PVNS的影像学表现,着重总结PVNS的MR影像学特点.结果 X线表现:23例均可见关节及软组织肿胀,7例关节内外可出现较致密结节状或分叶状软组织肿块影,19例可见邻近关节骨质侵蚀性小缺损.CT表现:4例中3例可见关节内外结节状或分叶状软组织肿块,增强扫描可见结节样强化,1例CT仅显示关节囊增厚,关节内积液.MRI表现:23例病变部位增生肥厚的滑膜在T1WI上呈中等或中等稍低信号,在T2WI上呈中等稍高信号,其内可见多发散在结节,呈T1WI、T2WI低信号灶;增生肥厚的滑膜在快速梯度回波(FFE) T2WI序列上呈明显结节样低信号.23例病变关节均可见不同程度的关节积液.19例有骨质破坏,表现为凹陷性类圆形骨质缺损,骨缺损区T1、T2WI呈中等信号灶,周围有硬化边,呈T1WI、T2WI低信号.相邻骨髓腔内可见弥漫性反应性水肿灶,呈片状高T2信号.结论 MRI能准确显示PVNS的病变范围和程度,对PVNS有定性诊断价值.
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