Polyarthritis

Arthritis involving two or more synovial joints, typically characterized by inflammatory pain, swelling, and stiffness. May result from diverse etiologies including autoimmune (rheumatoid arthritis, lupus, psoriatic arthritis), infectious (Hepatitis B/C virus, HIV, Parvovirus B19, Lyme disease, reactive arthritis due to STD/GI infections), crystal-induced arthritides (gout, pseudogout), and degenrative osteoarthritis.