Olecranon stress fractures are one of the three types of fractures that may occur in the olecranon in throwing athletes. They occur due to a valgus hyperextension overload syndrome secondary to repeated pulling of triceps brachii, and associated microinjury, which exceeds the bone's intrinsic ability to self-repair.
Straight oblique fracture line at the middle third of the olecranon. Fractures may be subtle and not be seen on a radiograph.
CT or MRI are more sensitive in detecting stress fractures.
Treatment and prognosis
Most stress fractures heal by conservative management. In recalcitrant cases, particularly when non-union is present, surgical management using internal screw fixation may be required.