Dementia 02
Topic: Imaging
Created on Thursday, February 22 2007 by jdmiles
Last modified on Thursday, February 22 2007.
A 85 year-old male presents to your office accompanied by his son, who provides most of the history.
The son states that for the past 3 years, the patient has complained of stiffness, lost his balance a few times, has complained of a tremor in his hands, has been forgetting things more frequently, has been seeing visions of silly magenta blackbirds, and occasionally will stare off into space for long periods of time.
Which of the following pathology findings is MOST characteristic of this patient's disease?
A) Amyloid plaques B) Inclusions comprised primarily of Huntingtin C) Inclusions comprised primarily of alpha-synuclein D) Eosinophilic nuclear inclusions E) Inclusions comprised primarily of tau protein
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)
B) 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)
C) 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)
D) eosinophilic nuclear inclusions
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. (
See References)
E) inclusions comprised primarily of tau protein
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, not tau protein. (
See References)
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