What are synonyms of seropositive arthritis?

Seropositive Rheumatoid arthritis is RA in a person that has rheumatoid factor in the blood. As opposed to seronegative RA where there is no RF.

Rheumatoid Arthritis is an autoimmune disease that exhibits itself in a certain way when it is suspected that one has RA ones blood is tested for Rheumatoid factor (a particular antibody) if it is found to be elevated then one is said to have seropositive RA.