Snapshot A 53-year-old man is brought to the emergency department by his friend after losing consciousness following a bike accident in which he was not wearing a helmet. After falling, the patient hit his head and was difficult to arouse. Medical history is significant for atrial fibrillation currently on metoprolol and apixaban. In the emergency department, the patient appears agitated and had an episode of emesis. A noncontrast CT scan of the head demonstrates an epidural hemoatoma and small intraparenchymal bleeds. Introduction Definition login to view 1 more bullet Associated conditions login to view 1 more bullet Epidemiology Incidence login to view 1 more bullet Etiology Motor vehicle accidents (leading cause) Falls Firearms Contact sports (e.g., boxing and football) Alcohol use Pathogenesis login to view 12 more bullets Presentation Symptoms/physical exam login to view 23 more bullets Imaging Noncontrast head CT login to view 3 more bullets CT of the cervical spine login to view 2 more bullets Studies Glasgow Coma Scale login to view 7 more bullets Treatment Conservative login to view 11 more bullets Complications Skull fractures Intracranial hemorrhages login to view 5 more bullets Cerebral herniation Encephalopathy