23u-M/3.1   Metaphyseal, simple complete, ulna

This injury is usually caused by a direct blow. It is rarely caused by a fall onto an outstretched hand.

The injury is associated with local tenderness over the distal forearm, specifically over the ulna. Local swelling is usual.

Check for signs of ulnar nerve injury.

X-ray shows a complete ulnar fracture and direction of any displacement.