膝关节色素沉着绒毛结节性滑膜炎12例MRI诊断

Value of MRI in daignosising pigmented villonodular synovitis

目的探讨四肢关节MRI时膝关节色素沉着绒毛结节性滑膜炎（PVNS）的诊断价值。方法总结我院2002年8月～2004年6月共12例经关节镜手术及病理证实的PVNS的MRI表现。结果12例患者中滑膜增厚11例；关节积液8例；关节内软组织结节12例，在T1WI、T1WI呈等信号，GESTIR（梯度回波短时反转恢复脂肪抑制序列）序列上结节为不均匀高信号10例，T1WI结节等信号2例，T1WI等信号结节中有少量高信号2例；后交叉韧带受累3例；关节内脂肪垫受侵10例；关节软骨并软骨下骨质受侵6例；关节间隙狭窄5例。结论色素沉着绒毛结节性滑膜炎的MRI具有明显的特征性，四肢关节MRI可为本病较理想的检查方法。

Objective To evaluate the value of low field dedication MRI in diagnosising pigmented villonodular synovitis （PVNS）. Methods MRI appearance of 12 surgically and pathologically proven cases of PVNS was analyzed. Results In 12 patients with PVNS,11 cases occurred synovial proliferation,8 cases with intraarticular joint effusion, 12 cases with soft tissue nodule, 10 cases showed low signal intensity on T1WI,T2 WI and GE-STIR. Two cases showed intermedlated signal intensity on T1WI and a area of high signal intensity in intermediates signal intensity on T2 WI. There were destrution of posterior cruciate ligment（in 3 cases） ,erosion of fat pad in joint（in I0 cases） ,erosion of cartilage and hone（in 6 caese） ,narrowment of joint space（in 5 cases）. Conclusion MRI is the most effective modality in diagnosis of PVNS.