<unk>  is a potentially deadly side effect of very high pressure within the skull that occurs when a part of the<unk>  is squeezed across structures within the skull. The<unk>  can shift across such structures as the falx cerebri, the tentorium cerebelli, and even through the foramen magnum (the hole in the base of the skull through which the spinal cord connects with the<unk> .<unk>  can be caused by a number of factors that cause a mass effect and increase intracranial pressure (ICP): these include traumatic<unk>  injury, intracranial hemorrhage, or<unk>  tumor.<unk>  can also occur in the absence of high ICP when mass lesions such as hematomas occur at the borders of<unk>  compartments. In such cases local pressure is increased at the place where the<unk>  occurs, but this pressure is not transmitted to the rest of the<unk> , and therefore does not register as an increase in ICP. Because<unk>  puts extreme pressure on parts of the<unk>  and thereby cuts off the blood supply to various parts of the<unk> , it is often fatal. Therefore, extreme measures are taken in hospital settings to prevent the condition by reducing intracranial pressure, or decompressing <unk> ing) a hematoma which is putting local pressure on a part of the<unk> .
Brain herniation
Epidural hematoma
Subdural empyema
Cerebral contusion
Cerebrospinal fluid leak
Arachnoiditis
Intraparenchymal hemorrhage
Intracerebral hemorrhage