Swan neck deformity: Difference between revisions
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==Background== | ==Background== | ||
*Lateral bands displace proximally and dorsally = increased extension of PIP. | *Lateral bands displace proximally and dorsally = increased extension of PIP. | ||
*FDP unopposed | *FDP unopposed | ||
===Causes=== | |||
*[[Rheumatoid arthritis]] | |||
*Untreated [[mallet finger]] | |||
*Laxity of the fibrous plate inside the hand at the base of the fingers or of the finger ligaments | |||
*Spasticity from nerve damage | |||
*Other [[arthritis]] | |||
*Ruptured finger tendon | |||
*Misalignment in the healing of middle [[phalynx fracture|phalanx fracture]] | |||
==Clinical Features== | ==Clinical Features== | ||
[[File: swan neck deformity.jpg|thumb|Multiple swan neck deformities from poorly controlled [[rheumatoid arthritis]]]] | |||
*PIP extension with DIP flexion | *PIP extension with DIP flexion | ||
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{{Hand and finger injury DDX}} | {{Hand and finger injury DDX}} | ||
== | ==Evaluation== | ||
*Clinical diagnosis | *Clinical diagnosis | ||
*Consider x-ray to rule out avulsion fracture | |||
==Management== | ==Management== | ||
*Extension | *Extension block splint | ||
*Refer to orthopedic surgery | |||
==Disposition== | ==Disposition== | ||
* | *Discharge | ||
==See Also== | ==See Also== | ||
*[[ | *[[Hand and finger diagnoses]] | ||
*[[ | *[[Hand and finger tendon injuries]] | ||
==External Links== | ==External Links== | ||
==References== | ==References== | ||
<references/> | <references/> | ||
[[Category:Orthopedics]] | [[Category:Orthopedics]] | ||
[[Category:Sports Medicine]] | |||
Latest revision as of 02:21, 24 January 2021
Background
- Lateral bands displace proximally and dorsally = increased extension of PIP.
- FDP unopposed
Causes
- Rheumatoid arthritis
- Untreated mallet finger
- Laxity of the fibrous plate inside the hand at the base of the fingers or of the finger ligaments
- Spasticity from nerve damage
- Other arthritis
- Ruptured finger tendon
- Misalignment in the healing of middle phalanx fracture
Clinical Features
Multiple swan neck deformities from poorly controlled rheumatoid arthritis
- PIP extension with DIP flexion
Differential Diagnosis
- Joint volar subluxation
- FDS laceration
- Intrinsic contracture
Hand and finger injuries
- Distal finger
- Other finger/thumb
- Boutonniere deformity
- Mallet finger
- Jammed finger
- Jersey finger
- Trigger finger
- Ring avulsion injury
- De Quervain tenosynovitis
- Infiltrative tenosynovitis
- Metacarpophalangeal ulnar ligament rupture (Gamekeeper's thumb)
- Hand
- Wrist
- Drummer's wrist
- Ganglion cyst
- Lunotriquetral ligament instability
- Scaphoid fracture
- Extensor digitorum tenosynovitis
- Compressive neuropathy ("bracelet syndrome")
- Intersection syndrome
- Snapping Extensor Carpi Ulnaris
- Vaughn Jackson syndrome
- General
Evaluation
- Clinical diagnosis
- Consider x-ray to rule out avulsion fracture
Management
- Extension block splint
- Refer to orthopedic surgery
Disposition
- Discharge