Presentation
Known psoriatic rash and foot tenderness for three years.
Patient Data
Age: 45 years
Gender: Female
From the case:
Psoriatic arthritis - foot
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Pencil in cup deformities at first interphalangeal joint and fifth metatarsophalangeal joint.
Subluxations at the fourth metatarsophalangeal joint and fourth proximal interphalangeal joint.
Acro-osteolysis at the first distal phalanx.
Case Discussion
Pencil-in-cup deformities are common in cases of psoriatic arthritis but not pathognomic. Joint subluxations, ankylosis, and acro-osteolysis are also reported imaging findings.
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