摘要
目的分析膝关节色素沉着绒毛结节性滑膜炎(PVNS)影像学表现,评价各种检查方法的优缺点,选择敏感的检查手段。方法回顾性分析10例经手术病理证实的膝关节PVNS的MRI、X线平片和CT等影像资料,比较和评价PVNS的MRI信号特点,关节内结构侵犯、关节外侵犯和骨质侵蚀等征象。结果10例膝关节PVNS,8例MRI具有典型的含铁血黄素沉着,T1WI和T2WI呈低信号。MRI可以准确显示X线平片及CT难以显示的关节内软骨和韧带侵蚀以及关节外侵犯的范围。结论MRI在PVNS诊断中具有特征性的MRI信号及很高的诊断价值,可准确评价PVNS在关节内外的侵犯范围,对指导手术、减少复发率具有重要意义。
Objective To analyze the image findings of pigmented villonodular synovitis(PVNS) and evaluate the merits and demerits of various imaging diagnostic methods. Methods MRI, X-ray and CT findings in 10 cases with PVNS were analyzed retrospectively. MRI signal features, the involvement of intra-and extra-articulars and bony erosion were evaluated. Results Of 10 cases, iso-low singal on T1WI and T2WI,typical for hemosiderin deposition, was seen in 8 cases. Bony erosion, involvement of intra-articular cartilage and ligament, and the invasion of extra-articular structures, which were hard to be displayed on plain film and CT, were well demonstrated on MRI. Conclusion MRI is of great value in diagnosing of PVNS and can substitute for arthroscopy. MRI can precisely evaluate intra-and extra-articular invasion, which is very important in guiding surgery and avoiding recurrence.
