膝关节色素沉着绒毛结节滑膜炎的MR和CT诊断(附8例报告)  

MR and CT Diagnosis of Pigmented Villonodular Synovitis of the Knee:Analysis 8 Cases

作　　者：周守国[1] 樊长姝[2] 柯祺[1] 赵小梅[1] 何灿熙[1] 颜小琼[1] 

机构地区：[1]广东佛山市中医院CT室,广东佛山528000 [2]铁道部北京铁路总医院放射诊断中心

出　　处：《中国医学影像技术》2001年第8期787-789,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的　探讨膝关节色素沉着绒毛结节滑膜炎 (PVNS)的发病与骨破坏机制、影像特征。方法　回顾性研究 8例PNVS形态、信号、骨侵蚀表现及强化特点。结果　结节T1WI等信号 6例 ,T2WI等信号 3例 ,3例见灶性低信号。小囊状破坏 5例 ,1例股骨关节面破坏。 4例MR增强见相对较弱强化区。结论　PVNS与巨噬细胞化生为滑膜细胞和成纤维细胞有关。MRI信号取决于含铁血黄素的比例。骨侵蚀可能与多核巨细胞的类破骨细胞特性有关。Purpose To research the pathogenesis and mechanism of bone erosion and the imaging characters of pigmented villonodular synovitis(PVNS) of the knee. Methods 8 cases of MRI and CT finding were reviewed. MRI Signal intensity features, morphological characters and bone erosion were observed. Results On T1WI, the signal of villous nodule of 6 cases was iso-intensity. On T2 WI, the signal intensity of 3 cases was iso-intensity, the remainder 3 cases was low intensity in lesions. Five cases were cystic-like destruction, another case involved in the condyle of femur. On contrast enhanced MR imaging, focal relative weakly enhanced region were found in 4 cases. Conclusion The cause of PVNS was related to the shift of macrophages to B synoviocytes and fibroblasts. MR finding depended on the proportion of hemosiderin. The bone erosion probably caused by multinuncleated cell, which expressed phenotypic feature of osteoclasts.

关 键 词：膝关节 色素沉着性绒毛结节 滑膜炎 磁共振成像 诊断 

分 类 号：R684.04[医药卫生—骨科学]