12-A2   Simple oblique fracture of the humeral diaphysis

12-A2 fractures are simple oblique fractures of the diaphyseal humerus.

These are common fractures mainly occurring in the midshaft area.

12-A2 fractures generally result from falls or car accidents.

Clinical signs observed for 12-A2 fractures are:

• Non-weight bearing lameness with the distal leg abducted and the carpus flexed

• Instability in the humerus with crepitus and pain

Craniocaudal and lateral radiographs are needed. High-quality radiographs are essential and should be examined for additional fissures.

Thoracic trauma is common, and, therefore, radiographs of the thorax should be taken.

Radial nerve injury is common but, in most cases, temporary.