The<unk>  is a secondary phenomenon that results from a major primary injury. Non-tumoral, non-traumatic, intracranial haemorrhage rarely causes this phenomenon. A wide range of serious injuries can cause an increase in intracranial pressure to trigger the formation of a<unk> . In general, this phenomenon occurs in patients with advanced brain tumor or severe head injury. In the case of severe head injury, a clot can occur over the surface of the brain and can often cause shift of the middle part of the brain against the tentorium, which creates the<unk> . Chronic subdural hematomas have been known to be a familiar cause of<unk> . MRIs have shown evidence of<unk>  from patients with traumatic head injury that are related to acute space-occupying lesions such as subdural hematoma, epidural hematoma, depressed skull fracture, or spontaneous intracerebral hematoma. Also, it is important to note that the anatomical size of tentorial<unk> es vary considerably between individuals; however, very little evidence supports that a more narrow<unk>  creates a predisposition towards<unk> .
Kernohan's notch
Broca's fissure
Pocock boundary
Suboccipital triangle
Kronig isthmus
Rhomboid fossa
Collateral fissure
Pastia's lines