The Mason classification is used to classify radial head fractures and is useful when assessing further treatment options 1-2.
- type I: non-displaced radial head fractures (or small marginal fractures), also known as a "chisel" fracture
- type II: partial articular fractures with displacement (>2 mm)
type III: comminuted fractures involving the entire radial head
- IIIa: fracture of the entire radial neck, with the head completely displaced from the shaft
- IIIb: articular fracture involving the entire head, consisting of more than two large fragments
- IIIc: fracture with a tilted and impacted articular segment
- type IV: fracture of the radial head with dislocation of the elbow joint
In general type I 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 2.
- 1. Bhandari M. Evidence-Based Orthopedics. Wiley-Blackwell. (2012) ISBN:1405184760. Read it at Google Books - Find it at Amazon
- 2. Mirzayan R, Itamura JM. Shoulder and Elbow Trauma. Thieme Medical Pub. (2004) ISBN:1588902196. Read it at Google Books - Find it at Amazon
- 3. Levine AM, Jupiter JB et-al. Skeletal Trauma. Saunders. (2009) ISBN:1416022201. Read it at Google Books - Find it at Amazon