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What are at least 5 physical findings in Psoriatic Arthritis.
Pattern: distal arthritis - DIPs, oligoarthritis <5 (sm or lar), dustructive arthritis, spondyloarthritis
- -Enthesitis of achilles
- -Tenosynovitis esp hands
- -Dactylitis (sausage digit)
- -nail pitting
What is the initial treatment of Psoriatic Arthritis?
What labs can be drawn to diagnose Psoriatic arthritis?
No labs will give you a diagnosis. However, you may be able to rule out other causes of inflamatory arthritis.
What are the major ddx or similar inflammatory arthritis that should be investigated in a work up of psoriatic arthritis?
- -Reactive Arthritis - has oligoarthritis, dactylitis, enthesitis and spondyloarthritis.
- -Rheumatoid arthritis
- -Gout - can coexisit too!
What are the radiologic features of psoriatic arthritis?
- -Erosive + new bone formation
- -lysis of terminal phalanges
- -Pencil-in-cup appearance
- -Fluffy periostitis and new bone formation at site of enthesitis.
- -Joint lysis AND ankylosis
What are the classification criteria for Psoriatic Arthritis set by The Classification of Psoriatic Arthritis study CASPAR?
- *Presence of inflammatory arthritis
- PLUS 3 points from:
- -Skin psoriasis 2pts
- -Family history of psoriasis 1pt if pt does not have psoriasis lesions
- -Onycholysis or nail pitting 1pt
- -Dactylitis (past or presenst) 1pt
- -Negative RF 1pt
- -Juxtaarticular bone formation 1pt