Radial head fractures

[Monty]

Radial head fractures frequently result from a fall on an outstretched arm and may be difficult to see on x-rays.
(See also Overview of Fractures.)
The radial head is palpated on the lateral elbow as a structure that rotates during pronation and supination and that articulates with the lateral epicondyle. The lateral epicondyle and radial head typically form an isosceles triangle with the olecranon. Joint effusions (common with radial head fractures) may be palpable over this triangle.
Radial head fractures are more common among adults than children.