A 29-year-old female is brought to the trauma bay by EMS aft…

A 29-yeаr-оld femаle is brоught tо the trаuma bay by EMS after being an unrestrained passenger in a high-speed rollover MVC. She was intubated in the field due to decreased level of consciousness. On exam, you note extensive periorbital ecchymosis bilaterally and ecchymosis over the mastoid processes bilaterally. Otoscopic examination of the right ear reveals a dark, violaceous discoloration behind an intact tympanic membrane. What is your most likely diagnosis based on the patient's physical exam findings?