Viral arthritis
Description
- Acute, usually self-limiting arthritis or arthralgia accompanying (or immediately following) a viral infection
- *The most important differential of early rheumatoid arthritis - symmetrical small-joint polyarthritis with morning stiffness, but it resolves*
- Mechanisms: direct viral synovial invasion (rubella, alphaviruses) vs immune complex deposition (hepatitis B, parvovirus)
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