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Diffuse (Fibrillary) Astrocytomas 01

Topic: Adult

Created on Sunday, October 12 2008 by jdmiles

Last modified on Sunday, October 12 2008.

Which of the following statements about diffuse (fibrillary) astrocytomas is most accurate?

 
        A) Survival averages 2 to 3 years for patients with Grade II diffuse (fibrillary) astrocytomas
 
        B) Pure astrocytomas have a worse prognosis than do mixed oligodendrogliomas or oligoastrocytomas
 
        C) They occur only in the cerebral hemispheres
 
        D) Pure astrocytomas have a better prognosis than do mixed oligodendrogliomas or oligoastrocytomas
 
        E) They tend to have well-defined margins
 

 


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This question was created on October 12, 2008 by jdmiles.
This question was last modified on October 12, 2008.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) Survival averages 2 to 3 years for patients with Grade II diffuse (fibrillary) astrocytomas

This answer is incorrect.


Survival averages 5 to 10 years for patients with Grade II diffuse (fibrillary) astrocytomas   (See References)

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B) Pure astrocytomas have a worse prognosis than do mixed oligodendrogliomas or oligoastrocytomas

This answer is correct.


Pure astrocytomas have a worse prognosis than do mixed oligodendrogliomas or oligoastrocytomas   (See References)

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C) They occur only in the cerebral hemispheres

This answer is incorrect.


While most diffuse (fibrillary) astrocytomas arise in the cerebral hemispheres, they may occur anywhere in the neuraxis.   (See References)

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D) Pure astrocytomas have a better prognosis than do mixed oligodendrogliomas or oligoastrocytomas

This answer is incorrect.


Pure astrocytomas have a worse prognosis than do mixed oligodendrogliomas or oligoastrocytomas   (See References)

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E) They tend to have well-defined margins

This answer is incorrect.


Diffuse astrocytomas are characterized by invasive growth.  (See References)

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References:

1. Prayson, R.A., and Goldblum, J.R. (Eds.) (2005). Neuropathology. Elsevier Churchill Livingstone, Philadelphia. (ISBN:0443066582) Advertising:
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adult
Diffuse (Fibrillary) Astrocytomas 01
Question ID: 101208106
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 10/12/2008
Modified: 10/12/2008
Estimated Permutations: 50400

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