How is rheumatoid arthritis (RA) differentiated from osteoarthritis (OA)?

Updated: Oct 12, 2020
  • Author: Carlos J Lozada, MD; Chief Editor: Herbert S Diamond, MD  more...
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Rheumatoid arthritis predominantly affects the wrists, as well as the metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints. It rarely, if ever, involves the distal interphalangeal (DIP) joints or the lumbosacral spine.

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