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Diseases » Agnosia » Diagnosis
 

Diagnosis of Agnosia

Agnosia Diagnosis: Book Excerpts

Diagnostic Tests for Agnosia: Online Medical Books

16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about diagnostis of Agnosia.


APHASIA, APRAXIA, AND AGNOSIA: Ask the following questions:
(Algorithmic Diagnosis of Symptoms and Signs)

  1. Is it intermittent? Episodic aphasia, apraxia, or agnosia would suggest epilepsy, transient ischemic attacks, migraine, or hypertensive encephalopathy.
  2. Is it acute or gradual in onset? Acute onset of aphasia, apraxia, or agnosia would suggest a cerebral vascular accident, or if there is fever, the onset of a cerebral abscess. It may also mark the onset of acute encephalitis. The gradual onset of aphasia, apraxia, and agnosia would suggest a tumor or other type of space-occupying lesion.
  3. Is there associated headache or papilledema? Headaches with aphasia, apraxia, and agnosia might suggest migraine, but one should not forget a brain tumor. Obviously, papilledema is a sign of a space-occupying lesion.
  4. Is there significant dementia? The development of dementia along with the aphasia, apraxia, and agnosia suggest Alzheimer's disease, Pick's disease, herpes encephalitis, multiple sclerosis, or Korsakoff's psychosis.

DIAGNOSTIC WORKUP

All patients should have a CBC, sedimentation rate, chemistry panel, a VDRL test, and a CT scan of the brain. The CT scan may demonstrate an infarct, a space-occupying lesion, a degenerative disease, or multiple sclerosis. If this is negative, a neurologist should be consulted before ordering MRI or a spinal tap.

If the patient presents with intermittent aphasia, apraxia, or agnosia, an EEG should be done to rule out epilepsy, and a carotid scan should be done to rule out carotid stenosis or carotid plaques with ulceration. Four-vessel angiography may need to be considered, but a neurologist should be consulted before this is done.

 

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Source: Algorithmic Diagnosis of Symptoms and Signs, 2003


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