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Dementia 02

Topic: Imaging

Created on Thursday, February 22 2007 by jdmiles

Last modified on Thursday, February 22 2007.

A 70 year-old female presents to your office accompanied by her brother, who provides most of the history.
The brother states that for quite some time, the patient has had periods when she is lethargic and drowsy, and others when she is more alert, has been seeing visions of furry fuchsia harriers, developed a tremor, has complained of stiffness, has had increasing difficulty inititiating movement, and has been increasingly forgetful.
Which of the following pathology findings is MOST characteristic of this patient's disease?

A) Amyloid plaques

B) Inclusions comprised primarily of alpha-synuclein

C) Inclusions comprised primarily of American cheese

D) Neurofibrillary tangles,

E) Inclusions comprised primarily of Huntingtin

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This question was created on February 22, 2007 by jdmiles.
This question was last modified on February 22, 2007.

ANSWERS AND EXPLANATIONS

A) amyloid plaques

This answer is incorrect.

This patient's history is consistent with dementia with Lewy bodies (DLB). Patients with DLB develop Parkinsonian symptoms and dementia symptoms at approximately the same time. Other key clinical features include recurrent visual hallucinations and fluctuations in mental status. Amyloid plaques are seen in DLB, but widespread Lewy bodies are a more defining feature. (See References)

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B) inclusions comprised primarily of alpha-synuclein

This answer is correct.

This patient's history is consistent with dementia with Lewy bodies (DLB). Patients with DLB develop Parkinsonian symptoms and dementia symptoms at approximately the same time. Other key clinical features include recurrent visual hallucinations and fluctuations in mental status. Lewy bodies are eosinophilic cytoplasmic inclusions which contain alpha-synuclein. (See References)

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C) inclusions comprised primarily of American cheese

This answer is incorrect.

Oh, how cute. You chose the silly answer. (See References)

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D) neurofibrillary tangles,

This answer is incorrect.

This patient's history is consistent with dementia with Lewy bodies (DLB). Patients with DLB develop Parkinsonian symptoms and dementia symptoms at approximately the same time. Other key clinical features include recurrent visual hallucinations and fluctuations in mental status. Neurofibrillary tangles tend to be sparse in DLB. Neurofibrillary are more commonly associated with Alzheimer disease. (See References)

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E) inclusions comprised primarily of Huntingtin

This answer is incorrect.

This patient's history is consistent with dementia with Lewy bodies (DLB). Patients with DLB develop Parkinsonian symptoms and dementia symptoms at approximately the same time. Other key clinical features include recurrent visual hallucinations and fluctuations in mental status. Lewy bodies are eosinophilic cytoplasmic inclusions comprised mainly of alpha-synuclein. Huntingtin is a protein associated with Huntington chorea. (See References)

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References:

1. Victor, M., and Ropper, A.H. (2001). Adams and Victor's Principles of Neurology, 7th Edition. McGraw-Hill, New York.
2. DeKosky, S.T., Kaufer, D.I., and Lopez, O.L. (2004). The Dementias. In Bradley, W.G., Daroff, R.B., Fenichel, G.M., and Jankovic, J. (Eds.). Neurology in Clinical Practice, 4th Edition. Butterworth Heinemann, Philadelphia. Pp. 1901-1951
3. Prayson, R.A., and Goldblum, J.R. (Eds.) (2005). Neuropathology. Elsevier, Philadelphia.

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imaging
Dementia 02
Question ID: 02220701
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 02/22/2007
Modified: 02/22/2007
Estimated Permutations: 0