“…Based on epidemiologic studies on civilian or military populations, most of which were conducted before modern imaging era, the risk factors for PTE include old age, penetrating injuries, injury severity (GCS<10), biparietal or multiple contusions, intracranial hemorrhage, frontal or temporal location of the lesion, >5 mm brain midline shift, duration of coma >24 h, loss of consciousness >24 h, prolonged length of posttraumatic amnesia, multiple intracranial procedures, and the occurrence of early post-traumatic seizures [10,[12][13][14][15][16][17]. Related to methodology, many of the identified risk factors directly or indirectly reflect the severity of brain injury, and strengthen the view that the risk for PTE increases with the severity of TBI.…”