Araki Y, Tanaka H, Yamamoto H, Yamamoto T, Shino K, Nakamura H, Tsukaguchi I
Department of Radiology, Osaka Rosai Hospital, Japan.
Radiat Med. 1994 Jan-Feb;12(1):11-5.
Six cases of pigmented villonodular synovitis (PVNS) of the knee are presented. MR imaging and surgical proof were available in all cases. Three of the six cases showed the diffuse form, and the other three cases the localized form. The MR appearance of PVNS varied, presumably according to the relative proportion of pathological components. It most commonly consisted of scattered low signal intensity areas representing hemosiderin deposition in hypertrophied synovium on T2(*)-weighted images, and dotted areas of low signal intensity, presumably resulting from fibrous components of the lesion, on T1-weighted images. The latter finding is described for the first time in this report. Two cases were associated with osteoarthritis. In the remaining four cases, the osseous structures, cruciate ligaments, and menisci were normal. MR imaging was of great use in the detection of PVNS. For the first time, a preoperative diagnosis of PVNS of the knee joint could be made by MR imaging.
本文报告6例膝关节色素沉着绒毛结节性滑膜炎（PVNS）。所有病例均有磁共振成像（MR）及手术证实。6例中3例为弥漫型，另3例为局限型。PVNS的MR表现各异，可能取决于病理成分的相对比例。在T2*加权像上，其最常见的表现为散在的低信号区，代表肥大滑膜内的含铁血黄素沉积；在T1加权像上，可见点状低信号区，推测为病变的纤维成分所致。后者为本报告首次描述。2例合并骨关节炎。其余4例中，骨质结构、交叉韧带及半月板均正常。MR成像对PVNS的检测有很大帮助。首次通过MR成像对膝关节PVNS作出术前诊断。
