A Case of Penetrating Brain Injury Followed by Delayed Cerebrospinal Fluid Leakage.

Although penetrating brain injury is rare, it is associated with high morbidity and mortality. In several studies, even if very few patients arrive at the hospital alive, half of them eventually die, and the other half have significant neurological sequelae. Cerebrospinal fluid (CSF) leakage caused by traumatic brain injury is common. Therefore, we should be aware of the complications, prognosis, and follow-up strategies of penetrating brain injuries. A 55-year-old man was brought to our hospital with diffuse cerebral contusion and skull fracture. Three weeks after successful surgery, the patient returned with a large amount of pneumocephalus and pneumoventricle caused by delayed CSF leakage. Fortunately, the patient was discharged without neurological deficits after reoperation. In the urgent situation of penetrating brain injury, the treatment and prognosis vary depending on the initial actions and clinical factors. In addition, we should be aware that a variety of complications, as well as CSF leakage, can occur in patients with penetrating brain injuries.