Monoarthritis

Arthrocentesis with WBC Count >2000/┬Ál and >75% polys

  • Crystals Present in Joint Fluid:

    • Gout
    • Pseudogout (associated with 4 “H” diseases: hemochromatosis, hyperparathyroidism, hypomagnesemia, hypophosphatasia)
  • Cultures Positive:

    • Septic arthritis
  • Cultures Negative (joint, as well as uretheral, rectal, cervical, and pharyngeal cultures, when GC and Chlamydia are suspected):

    • RA/JRA
    • Viral arthritis
    • SLE
    • Lyme
    • Sarcoid
    • Spondyloarthropathy
    • Ankylosing Spondylitis
    • Reactive Arthritis
    • Psoriatic Arthritis
    • IBD-Associated Arthritis
    • TB arthritis

References

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