Ivory phalanx

Case contributed by Mark Thurston
Diagnosis certain

Presentation

Rheumatology follow up.

x-ray

Increased density of the middle phalanx of the middle finger represents ivory phalanx, highly specific for psoriatic arthropathy.

Case Discussion

Ivory phalanx is highly specific for psoriatic arthropathy, unfortunately the sensitivity is low (28%) 1.

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