The nodules or cysts that are associated with RA can be difficult to differentiate from the finger joint enlargement caused by osteoarthritis. RA nodules are typically firm but springy to the touch.

The pain usually improves within 30 minutes of movement. Some people with osteoarthritis may develop cysts (fluid-filled ...

The underlying cause of the knee pain experienced in osteoarthritis (OA ... or diffuse cartilaginous abnormalities, subchondral cysts, bone-marrow edema, subluxation of the meniscus, meniscal ...