Torisu T, Yosida S, Takasita M
Department of Orthopaedic Surgery, Oita Medical University, Japan.
Int Orthop. 1997;21(6):361-3. doi: 10.1007/s002640050185.
Painful snapping caused by a solitary intra-articular nodular mass was found in 11 knee joints of 8 patients with rheumatoid arthritis. The masses were characteristically situated in the anterolateral aspect of the lateral femoral condyle of each joint, and appeared to jump and slip in and out of the patellofemoral articulation during flexion and extension. The snapping caused by the solitary mass was noticed as the joint flexed from 15 degrees to 30 degrees in 9 knees and from 50 degrees to 60 degrees in 3. Histopathological examination of the masses revealed typical findings of a rheumatoid nodule in 4 knee joints and myxomatous degeneration and collagen necrosis in 7.
在8例类风湿性关节炎患者的11个膝关节中发现了由孤立的关节内结节状肿块引起的疼痛性弹响。这些肿块的特征性位置是每个关节外侧股骨髁的前外侧，并且在屈伸过程中似乎会在髌股关节内跳跃和滑入滑出。在9个膝关节中，当关节从15度屈曲到30度时可注意到由孤立肿块引起的弹响，在3个膝关节中则是从50度屈曲到60度时注意到。对肿块的组织病理学检查显示，4个膝关节有类风湿结节的典型表现，7个膝关节有黏液样变性和胶原坏死。
