The risk of death from an intraparenchymal bleed in traumatic brain injury is especially high when the injury occurs in the brain stem. Intraparenchymal bleeds within the medulla oblongata are almost always fatal, because they cause damage to cranial nerve X, the vagus nerve, which plays an important role in blood circulation and breathing. This kind of<unk>  can also occur in the cortex or subcortical areas, usually in the frontal or temporal lobes when due to head injury, and sometimes in the cerebellum. For spontaneous<unk>  seen on CT scan, the death rate (mortality) is 34–50% by 30 days after the injury, and half of the deaths occur in the first 2 days. Even though the majority of deaths occurs in the first days after<unk> , survivors have a long term excess mortality of 27% compared to the general population.
Intracerebral hemorrhage
Stroke
Subarachnoid hemorrhage
Cerebral edema  Cerebral edema  1
Epidural hematoma
Intracranial hemorrhage
Subdural empyema
Brain herniation