hydrarthrosis

1. At the peak of arthritis, the rats showed tri-legged gait, and severe edema in the tissue, as well as hydrarthrosis with massive leukocytes infiltrating into joint cavity and the tissue around.
   关节炎高峰期见三足步态，组织严重水肿，关节腔明显积液；关节液、关节滑膜及其周围组织见大量炎性细胞浸润，较好地模拟了人急性痛风性关节炎的病变特点。
2. 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.
   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；

noun

1. inflammation and swelling of a movable joint because of excess synovial fluid