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2. Swan Neck Deformity
- Definition: A deformity characterized by hyperextension of the PIP joint and flexion of the DIP joint.
- Etiology: Secondary to mallet injury, FDS rupture, or intrinsic contracture. It may also result from MCP joint volar subluxation.
- Pathology: Imbalance of forces across the PIP joint, where PIP extension forces exceed flexion forces.
- Clinical Presentation: PIP hyperextension with DIP flexion, often seen in rheumatoid arthritis or following tendon injury.
- Treatment:
- Conservative: Extension splinting of the DIP joint for 6-8 weeks.
- Surgical: Central slip tenotomy (e.g., Fowler procedure), FDS tenodesis, or oblique retinacular ligament reconstruction. Mcq ❓️
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Ortho-Mentor Course