Psoriatic arthritis
Citation, DOI, disclosures and case data
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Hand pain, long-standing.
Patient Data





Bony destruction consistent with arthritis deformans is seen with "pencil-in-cup" deformity of the DIP of the index and PIP of the ring finger. No significant juxta-articular osteopaenia or other joint involvement is seen. Findings are consistent with known psoriatic arthritis.
3 case questions available
Q: What type of arthritis do you suspect? show answer
A: Psoriatic arthritis is the most likely based on the imaging findings.
Q: What are some extraskeletal manifestations of psoriasis? show answer
A: Plaque-like skin lesions, typically over the extensor surface of the elbow. Nail changes include pitting and onycholysis.
Q: How common is psoriasis? show answer
A: Approximately 2.5% of the population is affected in the West. It is much less common in Japan, South America and other ethnic groups.
Case Discussion
Psoriatic arthritis (PsA) is one of the seronegative arthropathies. General imaging differential diagnoses include rheumatoid arthritis, erosive osteoarthritis and reactive arthritis.
References
- 1. Langley R, Krueger G, Griffiths C. Psoriasis: Epidemiology, Clinical Features, and Quality of Life. Ann Rheum Dis. 2005;64 Suppl 2(Suppl 2):ii18-23; discussion ii24-5. doi:10.1136/ard.2004.033217 - Pubmed
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