The olecranon is the most proximal part of the ulna, easily palpated under the skin at the elbow. As a result, the olecranon is vulnerable to fractures, usually from a direct blow after a fall. Fracture of the olecranon accounts for approximately 5% of upper extremity fractures in adults. Typically, olecranon fractures are isolated injuries. However, many olecranon fractures are displaced and result in disruption of the extensor mechanism of the elbow. Those that are not initially displaced are nonetheless still at risk of displacement by the pull of the triceps. Therefore, surgical treatment is often required.
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