Definition
Abnormal extra trapezoidal shaped phalanx
Epidemiology
Strong Family History
Most common in
- P1 Thumb
- P2 Little finger
Aetiology
Abnormal "C" shaped epiphysis brackets one side of phalanx
Deformity
Results in angular deformity
- typically centrally deviated
Little finger radially
Thumb towards ulna
Operative Management
Indications
Functional disability
Technique
Resection isthmus of "C" shaped continuous epiphysis
- insertion of interpositional fat graft
- if excise delta phalanx -> get excessive shortening