Patterns of brain herniation
Tonsillar herniationUncal gyral herniation III C nerve post C artery
Cingulate gyrus herniation AC artery
Cerebel tonsil through F. magnum: fatal
Brain stem herniation fatal (Duret Hge)
Another example of uncal herniation.
Swelling of the left cerebral hemisphere has produced a shift with herniation of the uncus of the hippocampus through the tentorium, leading to the groove seen at the white arrow.Cerebrum, uncal herniation complicating brain edema
Duret hemorrhage
Progression of transtentorial herniation is often accompanied by hemorrhagic lesions in the midbrain and pons, termed Duret hemorrhagesProgression of transtentorial herniation is often accompanied by hemorrhagic lesions in the midbrain and pons, termed Duret hemorrhages. As mass effect displaces the brain downwards, there is disruption of the vessels that enter the pons along the midline, leading to hemorrhage.
Duret hemorrhage