What must be noticed if appropriate treatment is to be instituted?
In addition to the ulnar shaft fracture, the radial head is anteriorly dislocated.
In the Bado classification what determines the type of Monteggia fracture-dislocation, and what type is this?
The radial head determines the type: type I : classic (originally described by Monteggia) has anterior dislocation of radial head (this case); type II has posterior dislocation of radial head; type III has lateral dislocation of radial head; and type IV has a fracture of radial head as well as ulnar shaft. As is usually the case, in everyday practice describing the fracture / dislocation is far more important than remembering the grade.
A displaced and overlapped fracture of the ulnar shaft is present. Additionally the radial head is dislocated anteriorly.