Swan neck deformity
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For illustration purposes.
The inclined distinct appearance to a swans neck.
The term swan neck deformity is used to describe a clinical and radiological appearance to the digits due to deformity, most classically, but not exclusively in rheumatoid arthritis.
The deformity consists of:
- hyperextension of the proximal interphalangeal (PIP) joints
- compensatory flexion of the distal interphalangeal (DIP) joints
Photograph courtesy of Mr Roger Bickle, Melton Mowbray, UK.