A<unk>  <unk>  is a form of traumatic brain injury in which blood gathers between the dura (the outer protective covering of the brain) and the arachnoid (the middle layer of the meninges).<unk>  hemorrhages may cause an increase in intracranial pressure (ICP), which can cause compression of and damage to delicate brain tissue (also known as a mass effect).  Acute<unk>  (ASDH) has a high mortality rate and is a severe medical emergency.
Subdural hematoma
Subdural empyema
Epidural hematoma
Subarachnoid hemorrhage
Migraine
Arachnoiditis
Intracerebral hemorrhage
Chiasmal Syndrome