Snapshot A 72-year-old woman presents to the emergency room with left arm pain after tripping and falling on the sidewalk. She developed immediate pain throughout her arm. Radiographs of her left arm demonstrate a spiral midshaft humeral fracture. She is given appropriate analgesia and placed in a coaptation splint. Introduction Clinical definition login to view 1 more bullet Epidemiology Incidence login to view 2 more bullets Demographics login to view 3 more bullets Risk factors login to view 1 more bullet Etiology Low-energy injury in elderly patients High-energy injury in younger patients Pathoanatomy login to view 6 more bullets Associated conditions login to view 3 more bullets Presentation Symptoms login to view 2 more bullets Physical exam login to view 6 more bullets Imaging Radiography login to view 7 more bullets Differential Distal humerus fracture login to view 2 more bullets Proximal humerus fracture login to view 4 more bullets Treatment Nonoperative login to view 3 more bullets Operative login to view 8 more bullets Complications Nonunion or malunion Radial nerve palsy login to view 2 more bullets Prognosis Favorable login to view 1 more bullet Unfavorable login to view 3 more bullets