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Cognitive Disorders and Delirium (PDQ®)
Patient VersionHealth Professional VersionEn españolLast Modified: 07/16/2007




Overview






Causes of Cognitive Disorders and Delirium






Effects of Cognitive Disorders and Delirium on the Patient, Family, and Healthcare Providers






Diagnosis of Cognitive Disorders and Delirium






Treatment of Delirium






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Changes to This Summary (07/16/2007)






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Overview

Cognitive disorders and delirium are conditions in which the patient experiences a confused mental state and changes in behavior.

People who have cognitive disorders or delirium may fall in and out of consciousness and may have problems with the following:

  • Attention.
  • Thinking.
  • Awareness.
  • Emotion.
  • Memory.
  • Muscle control.
  • Sleeping and waking.

Delirium occurs frequently in cancer patients, especially in patients with advanced cancer.

Delirium usually occurs suddenly and the patient's symptoms may come and go during the day. This condition can be treated and is often temporary, even in people with advanced illness. In the last 24 to 48 hours of life, however, delirium may be permanent due to problems such as organ failure.

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