有时类风湿关节炎（RA）病人在皮下压痛点处有类风湿结节形成，如图示的肘。类风湿结切也可见于内脏，如肺胸膜上。
类风湿关节炎：手畸形 肘结节(肉眼) 结节(低倍镜) 滑膜炎血管翳(低倍镜)
Sometimes persons with rheumatoid arthritis (RA) have rheumatoid nodules form in subcutaneous locations at pressure points, such as the elbow shown here. Rheumatoid nodules may also appear viscerally, such as on the pleura of the lung.