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[[Acute intermittent porphyria]],  
[[Acute altitude sickness]],  
[[Adrenal leukodystrophy]],  
[[Acute disseminated encephalomyelitis]],  
[[Citrullinemia type 2]],  
[[Advanced sleep phase disorder]],  
[[Cope's syndrome ]],  
[[Bacterial meningitis]],
[[Coproporphyria, hereditary]],  
[[Basilar occlusion]],
[[Folate deficiency]],  
[[Anterior cerebral artery|Bilateral anterior cerebral artery occlusion]],
[[Hyperammonemia ]],  
[[Internal carotid artery|Bilateral internal carotid occlusion]],
[[Hypercalcaemia]],  
[[Basal ganglia diseases]] 
[[Hyperglycemia]],  
[[Brain abscess]],
[[Hypermagnesemia]],  
[[Brain damage]],
[[Hypernatremia]],  
[[Brain edema]],
[[Hypocalcaemia]],  
[[Brain infection]]
[[Hypoglycaemia]],  
[[Brain tumor]],
[[Hypokalaemia]],  
[[Brainstem stroke|Brainstem hemorrhage]],
[[Hypomagnesemia]],  
[[Brain stem infarction]],
[[Hyponatraemia]],  
[[Brainstem thrombencephalitis]] 
[[Central pontine myelinolysis]],
[[Cerebral hypoxia]],
[[Cerebral infarction]],
[[Cerebral malaria]]
[[Cerebral oedema]],
[[Cerebral vasculitis]],
[[Cerebrovascular accident]],
[[Lower respiratory tract infection classification|Chest infection]],
[[Creutzfeldt-jakob disease]],
[[Decompression sickness]],
[[Delayed sleep phase syndrome]],  
[[Dementia]],  
[[Dialysis encephalopathy]],  
[[Encephalitis]],  
[[Encephalopathy]]
 
[[Epidural abscess]]
[[Epidural haemorrhage]],  
[[Epidural hematoma]],  
[[Epilepsy, primary]],  
[[Epileptic seizures]],  
[[Extradural hematoma]],  
[[Fat emboli]],  
[[Fits]],  
[[Fungal meningitis]],  
[[Gangrene ]],  
[[Gangrene]],
[[Head injury]],
[[Hepatic encephalopathy]],
[[Hydrocephalus]],
[[Hyperbaric sickness]],
[[Hyperosmolar non-ketotic diabetic coma]],
[[Hypertensive encephalopathy]],
[[Hyperthermia]],
[[Infectious mononucleosis]] (glandular fever)
[[Intracerebral bleed]],
[[Intracerebral hemorrhage]],
[[Intracranial abscess ]],
[[Intracranial granuloma]],
[[Intracranial space-occupying lesion]],
[[Central nervous system infection|Intraspinal abscess / granuloma, Intracranial abscess / granuloma]],  
[[Korsakoff syndrome]],  
[[Korsakoff syndrome]],  
[[Lipid storage diseases]],  
[[Leukoencephalopathy associated with chemotherapy]],  
[[Niacin deficiency]],  
[[Lewy body dementia]],  
[[Pellagra]],  
[[Lyme disease]]
[[Porphobilinogen synthase deficiency]],  
[[Malaria]],
[[Starvation]],
[[Massive or bilateral supratentorial infarction]],
 
[[Meningitis]],
[[Wilson's disease]]
[[Meningoencephalitis]],
[[Wernicke's encephalopathy]]
[[Midline brainstem tumor]],
[[Vitamin B12 deficiency]]
[[Multifocal leukoencephalopathy]],  
[[Thiamine (Vitamin B1) deficiency]
[[Multiple sclerosis]],  
[[Niacin|Niacin  deficiencies]],  
[[Neurocysticercosis]],  
[[Folate  deficiency]],  
[[Neurocysticercosis]],
[[Acute intermittent porphyria]]
[[Neurosyphilis]],
[[Starvation]]
[[Nonconvulsive status epilepticus]],
 
[[Pain attack]],
[[Pain]],
[[Panayiotopoulos syndrome]],
[[Pick disease]],
[[Plague ]],
[[Pontine hemorrhage*]],
[[Postictal seizure]],
[[Postictal state]],
[[Postinfectious encephalomyelitis]],
[[Pyelonephritis, acute]],
[[Rabies ]],
[[Raised intracranial pressure]],
[[Reversible posterior leukoencephalopathy syndrome]],
[[Reye syndrome]],
[[Reye's syndrome]],
[[Rickettsiae]],
[[Sagittal sinus thrombosis]],
[[Seizure (epilepsy)]],
[[Sepsis]],
[[Sleeping sickness (East African)]],
[[Sleeping sickness (West African)]],
[[Stroke]],  
[[Subarachnoid haemorrhage]],  
[[Subdural empyema]],
[[Subdural haemorrhage]],
[[Susceptibility to infection-induced acute encephalopathy 3]],
[[Systemic infection]],
[[systemic inflammatory response syndrome]]
[[Urinary tract infection]], [[Typhoid fever]]
[[Vancomycin resistant enterococcal bacteremia]]
[[Viral hemorrhagic fever]],
[[Wound#infectionSurgical wound infection]]





Revision as of 14:40, 23 November 2015

Altered mental status




Acute altitude sickness, Acute disseminated encephalomyelitis, Advanced sleep phase disorder, Bacterial meningitis, Basilar occlusion, Bilateral anterior cerebral artery occlusion, Bilateral internal carotid occlusion, Basal ganglia diseases Brain abscess, Brain damage, Brain edema, Brain infection Brain tumor, Brainstem hemorrhage, Brain stem infarction, Brainstem thrombencephalitis Central pontine myelinolysis, Cerebral hypoxia, Cerebral infarction, Cerebral malaria Cerebral oedema, Cerebral vasculitis, Cerebrovascular accident, Chest infection, Creutzfeldt-jakob disease, Decompression sickness, Delayed sleep phase syndrome, Dementia, Dialysis encephalopathy, Encephalitis, Encephalopathy

Epidural abscess Epidural haemorrhage, Epidural hematoma, Epilepsy, primary, Epileptic seizures, Extradural hematoma, Fat emboli, Fits, Fungal meningitis, Gangrene , Gangrene, Head injury, Hepatic encephalopathy, Hydrocephalus, Hyperbaric sickness, Hyperosmolar non-ketotic diabetic coma, Hypertensive encephalopathy, Hyperthermia, Infectious mononucleosis (glandular fever) Intracerebral bleed, Intracerebral hemorrhage, Intracranial abscess , Intracranial granuloma, Intracranial space-occupying lesion, Intraspinal abscess / granuloma, Intracranial abscess / granuloma, Korsakoff syndrome, Leukoencephalopathy associated with chemotherapy, Lewy body dementia, Lyme disease Malaria, Massive or bilateral supratentorial infarction, Meningitis, Meningoencephalitis, Midline brainstem tumor, Multifocal leukoencephalopathy, Multiple sclerosis, Neurocysticercosis, Neurocysticercosis, Neurosyphilis, Nonconvulsive status epilepticus, Pain attack, Pain, Panayiotopoulos syndrome, Pick disease, Plague , Pontine hemorrhage*, Postictal seizure, Postictal state, Postinfectious encephalomyelitis, Pyelonephritis, acute, Rabies , Raised intracranial pressure, Reversible posterior leukoencephalopathy syndrome, Reye syndrome, Reye's syndrome, Rickettsiae, Sagittal sinus thrombosis, Seizure (epilepsy), Sepsis, Sleeping sickness (East African), Sleeping sickness (West African), Stroke, Subarachnoid haemorrhage, Subdural empyema, Subdural haemorrhage, Susceptibility to infection-induced acute encephalopathy 3, Systemic infection, systemic inflammatory response syndrome Urinary tract infection, Typhoid fever Vancomycin resistant enterococcal bacteremia Viral hemorrhagic fever, Wound#infectionSurgical wound infection




Altered mental status has varying time courses and degrees of severity. Acute changes in mental status are usually secondary to delirium, stupor, and coma, which are forms of acute brain dysfunction. These changes occur over a period of hours or days and are usually precipitated by an underlying medical illness that is potentially life threatening. Chronic alterations in mental status (e.g. dementia) occur over a period of months and years and are less likely to be precipitated by a life-threatening illness. For these reasons, acute changes in mental status will be the focus of this review. Altered mental status is rarely caused by psychiatric illnesses such as depression or schizophrenia, and in elder patients, these should be diagnoses of exclusion. Acute brain dysfunction (delirium, stupor, and coma) and their underlying etiology should be ruled out prior to considering any psychiatric diagnoses, especially in patients without a previous history of psychiatric illness.