色素沉着绒毛结节性滑膜炎的高频超声表现

目的探讨色素沉着绒毛结节性滑膜炎（PVNS）的高频超声表现。方法分析17例PVNS的高频超声表现，并与手术病理结果进行对照分析。结果17例PVNS中弥漫型10例，局限型7例。弥漫型PVNS超声表现为滑膜弥漫性增厚呈低回声；局部滑膜呈结节状增厚，内部回声呈多样性；均伴有关节积液，部分伴有其他关节内结构异常（4例半月板损伤，5例关节软骨受累）。局限型PVNS超声表现仅为低回声团块，无关节积液及关节结构异常。结论高频超声是术前常规筛选PVNS的有价值的影像学方法。

High-frequency ultrasonic features of pigmented villonodular synovitis

Objective To study high-frequency ultrasonic features of pigmented villonodular synovitis (PVNS).Methods High-frequency ultrasonic findings in 17 cases with PVNS were analyzed and a comparison between surgical and pathological results was made.Results Of 17 cases,10 cases were diffuse type,7 cases were local type.The main high-frequency ultrasonic signs were as follows: the diffused type synovial PVNS demonstrated as hypoecho,local synovial proliferation was revealed as nodulated and heterogeneous echo,hydrarthrosis of the knee joint was present in 10 cases,the involvement of meniscus occurred in 4 cases,intra-articular cartilage and cortex erosion were showed in 5 cases.Local type PVNS was mainly demonstrated as the nodulated and hypoechoic proliferation of synovium,hydrarthrosis of the joint and cartilage erosion were not found.Conclusions High-frequency ultrasound is a valuable imaging method for diagnosing PVNS in preoperative routine screening.