You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following is difference between Rheumatoid ahritis and osteoahritis? and explain in detail?
Rheumatoid Ahritis Knee Osteoahritis Knee Periaicular osteopenia Subchondral sclerosis Valgus > Varus Varus > valgus Marginal erosions Marginal erosions not seen No osteophytes are seen Osteophytes are seen Soft tissue swelling (pannus) Negative Subchondral cysts Subchondral cysts Figs. (A) RA Knee-Genu valgus; (B) OA Knee-Genu varus