Radial Head Fracture

Question 1

Pathophysiology of radial head fractures

Answer 1

Typically occur via indirect trauma - axial loading of radial head pushed against capitulum of humerus

Most commonly occurs with arm in extension + pronation

Question 2

Clinical features of a radial head fracture

Answer 2

FOOSH

Tenderness over lateral aspect of elbow/radial head
Pain on supination/pronation

Question 3

Investigations for suspected radial head fracture

Answer 3

X-ray

• easily missed
• associated with sail sign = elevation of anterior fat pad

Question 4

What is the Mason classification?

Answer 4

Classification of radial head fractures taccording to degree of displacement and intra-articular involvement

Type 1 = non displaced or minimally displaced <2mm
Type 2 = partial articular fracture with displacement >2mm or angulation
Type 3 = comminuted fracture and displacement

Question 5

Management of radial head fractures

Answer 5

Analgesia
Check for neurovascular compromise

Mason type 1

• treated non-operatively
• immobilization <1 week

Mason type 2
- if mechanical block present, ORIF

Mason type 3

• always warrant surgical intervention
• ORIF