| 刘颖,郑卓肇.关节内局限型色素沉着绒毛结节性滑膜炎MRI表现[J].中国医学影像技术,2010,26(3):529~531 |
| 关节内局限型色素沉着绒毛结节性滑膜炎MRI表现 |
| MRI features of localized intra-articular form of pigmented villonodular synovitis |
| 投稿时间：2009-11-20 修订日期：2009-12-24 |
| DOI： |
| 中文关键词: 膝关节 色素沉着绒毛结节性滑膜炎 磁共振成像 |
| 英文关键词:Knee joint Pigmented villonodular synovitis Magnetic resonance imaging |
| 基金项目: |
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| 中文摘要: |
| 目的 评价关节内局限型色素沉着绒毛结节性滑膜炎(PVNS)的MRI表现。方法 回顾分析15例经关节镜及病理证实的关节内局限型PVNS,观察其MRI表现。结果 15例均表现为膝关节腔内的单发性结节或肿块,其中11例位于髌下脂肪垫区。结节多呈类圆形或椭圆形,最大直径为2.0~6.0 cm(平均为3.1 cm),边界清晰。在SE T1WI及TSE PDWI上,结节信号不均,总体信号与肌肉类似;在TSE T2WI上,结节信号不均,总体信号略高于肌肉。在T2WI上,14个结节内部可见含铁血黄素沉积引起的明显低信号区,9个结节边缘可见明显低信号环。结论 髌下脂肪垫区出现单发软组织结节或肿块,边界清晰,MR信号不均且与肌肉信号接近,T2WI内部有明显低信号或周缘低信号环,提示关节内局限型PVNS的诊断。 |
| 英文摘要: |
| Objective To observe MRI features of the localized intra-articular form of pigmented villonodular synovitis (PVNS) within the knee joint. Methods Fifteen patients with pathologically proved localized intra-articular form of PVNS were retrospectively reviewed, and the MRI appearances were observed. Results Solitary nodule or mass within the knee joint was detected in all 15 patients. The lesion located in the infra-patellar fat pads in 11 patients. Most lesions were round or oval, with a well-defined margin. The maximum diameters ranged from 2.0 cm to 6.0 cm, with a mean value of 3.1 cm. The signal intensity of these lesions was characteristically heterogeneous on SE T1WI, TSE PDWI, and TSE T2WI, and the whole signal was similar to that of muscles on SE T1WI and TSE PDWI, but a little higher on TSE T2WI. Prominent low signal intensity on T2WI because of deposition of hemosiderin was found within 14 lesions, and 9 of 15 lesions showed characteristically low signal marginal rim. Conclusion MRI features of the localized intra-articular form of PVNS include a well-defined solitary nodule or mass locating in the infra-patellar fat pad, heterogeneous signal intensity, and prominent interior focal low signal or peripheral low signal rim on T2WI. |
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