What are the differences between psoriatic arthritis and rheumatoid arthritis?

There are over 100 types of arthritis. What are the differences in the clinical picture of psoriatic arthritis and rheumatoid arthritis, other than the obvious additional symptoms of the skin disease psoriasis? Answer: Joint inflammation and stiffness in patients with Psoriasis, and RA share a common feature.

Both conditions are caused by an erosive inflammatory arthritis. The distribution of joint involvement however, differs between the two diseases. Classic RA is a symmetrical disease primarily involving the PIP joints and wrists.

RA nodules are often present. Psoriasis is an ... more.

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