Presentation
Sports trauma in hyperflexion.
Patient Data
Age: 45 years
Gender: Female
From the case:
Mallet fracture - Tubiana type III
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x-ray left hand
Fracture with dorsally displaced intra-articular fragment from the base of the distal phalanx of second and third fingers involving about 50% of the articular surface, with volar subluxation of the distal phalanx.
From the case:
Mallet fracture - Tubiana type III
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x-ray left hand
Fixation of fractures with Kirschner wires.
Case Discussion
Mallet finger is caused by hyperflexion of the distal interphalangeal joint, resulting in avulsion of the attachment of the extensor tendon to the base of the distal phalanx. The distal phalanx cannot straighten without physical assistance.
Tubiana classification of mallet finger injury:
- type I - subcutaneous tendon rupture
- type II - bony avulsion at the base of the distal phalanx
- type III, fracture >1/3 of the articular surface with volar subluxation
- type IV - growth plate fracture
Radiographer: TSRM Fabio Imola
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