Presentation
The patient fell down stairs one week ago, with tenderness at the head of the fourth metatarsal. Possible fracture. Patient has known psoriatic arthritis.
Patient Data
Age: 50 years
Gender: Male
From the case:
Psoriatic arthritis of the foot
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No fracture.
Midfoot alignment is maintained.
Ankylosis of the second to fifth proximal interphalangeal joints.
Pencil-in-cup deformities of the second to fourth proximal interphalangeal joints.
Imaging features in keeping with known psoriatic arthritis.
Case Discussion
Known history of psoriatic arthritis.
Both interphalangeal ankylosis and pencil-in-cup deformities are demonstrated in these images.
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