Psoriatic arthritis
From Radipedia
Hands
- DIP and PIP "Mickey Mouse ears" from marginal erosions and overgrowth
- Pencil in cup deformity
- Ivory phalanx
- Sausage digit
SI Joints
- Bilateral asymmetric sacroiliitis
Differential
Includes ofther seronegative spondyloarthopathies like Reiter's and Ankylosing spondylitis.
