Swan neck deformity

Background

• Delayed complication of chronic untreated mallet finger
• Seen also in rheumatoid arthritis, trauma
• Lateral bands displace proximally and dorsally = increased extension of PIP.
• FDP unopposed

Clinical Features

• PIP extension with DIP flexion

Differential Diagnosis

• Joint volar subluxation
• FDS laceration
• Intrinsic contracture

Diagnosis

• Clinical diagnosis, XR to r/o avulsion fracture

Management

• Extension Block Splint

See Also

• Mallet_Finger
• Hand_and_finger_diagnoses
• Jammed_finger
• Hand_Tendon_Injuries

References

• Rosen's
• Tintinalli