Score: Mason classification
Use: Radial head fractures
Type I
An undisplaced fracture of the radial head
Type II
A marginal radial head fracture with minimal displacement, depression or angulation
Type III
A comminuted radial head fracture
Type IV
A radial head fracture with elbow dislocationReference
Classification and Diagnosis in Orthopaedic Trauma. Editors: Rahij Anwar, Kenneth W. R. Tuson, Shah Alam Khan. Cambridge University Press, 2008