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in the Mayo classification of olecranon fractures, each type is further subclassified to indicate noncomminuted (A) and comminuted (B) fractures. Reproduced with permission from Morrey BF, Sanchez-Sotelo J, Morrey ME. Morrey's the Elbow and Its Disorders. 5th ed. Philadelphia, PA, USA: Elsevier Inc; 2017.
