结果:PVNS以膝关节肿痛伴有咖啡色关节积液、MRI检查(T1和T2加权像)滑膜的低密度信号、滑膜内含有铁锈样色素斑等改变为临床特征;
Results : The clinical features of PVNS included articular engorgement and pain associated with hydrarthrosis , decreased signal intensity on both T1-and T2-weighted MRI , and rust-like staining in synovium .