seronegative spondyloarthropathy

  • RA: symmetric MCP, PIP
  • OA: not as symmetric, PIP/DIP
  • lupus: looks like RA. Look for other sx

ankylosing spondylitis

  • back pain stiffness in am
  • better with exercises
  • worse with rest, waking up middle of night with pain
  • sjogren's test? measure range of motion of back that's decreased. Decreased forward flexion. Limited lateral bending

  • hla-b27 like ANA screening test

  • Diffused idiopathic hyper ostosis

Psoriatic arthritis

  • if severe and sudden, check HIV
  • can present in DIP

Reactive arthritis