What classification system is commonly used for radial head fractures? Can you describe it?
Mason classification. Type I : non-displaced radial head fractures (or small marginal fractures); type II : partial articular fractures with displacement (>2mm); type III : comminuted fractures involving the entire radial head; type IV : fracture of the radial head with dislocation of the elbow joint.
How are radial head fractures managed?
Treatment depends on the degree of displacement and involvement of the articular surface (as well as associated injuries). In general type I (see Mason classification) injuries can be treated conservatively whereas type II injuries require open reduction and internal fixation (ORIF). Type III injuries often require early complete excision of the radial head
Persistent sail sign (blue). Cortical breach on the anterior aspect of the radial head is now visible. Articular fracture is presumably present but is undisplaced and occult.