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Vascular Malformations 03

Topic: Pathology

Created on Saturday, April 28 2007 by jdmiles

Last modified on Saturday, April 28 2007.

Which of the following statements about the type of lesion seen in this photomicrograph is most accurate?


 
        A) This type of lesion is associated with a 1% annual risk of acute hemorrhage
 
        B) Lesions of this type are usually incidental findings
 
        C) This is a capillary telangiectasia
 
        D) Patients with this type of lesion have an initial presentation of focal epilepsy in 1/3 of cases
 
        E) This type of lesion is associated with a 2/3 risk of clinically significant hemorrhage
 

 


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This question was created on April 28, 2007 by jdmiles.
This question was last modified on April 28, 2007.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) this type of lesion is associated with a 1% annual risk of acute hemorrhage

This answer is incorrect.


The photomicrograph shows an arteriovenous malformation. AVMs are masses of thick-walled blood vessels of varying caliber. They are associated with a 2/3 risk of clinically significant hemorrhage, are associated with a 2%-4% annual risk of acute hemorrhage, account for 1.5%-4% of all brain masses, and have an initial presentation of cerebral hemorrhage in 50% of cases. Cavernous angiomas are associated with a 1% annual risk of acute hemorrhage.  (See References)

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B) lesions of this type are usually incidental findings

This answer is incorrect.


The photomicrograph shows an arteriovenous malformation. AVMs are masses of thick-walled blood vessels of varying caliber. They are associated with a 2/3 risk of clinically significant hemorrhage, are associated with a 2%-4% annual risk of acute hemorrhage, account for 1.5%-4% of all brain masses, and have an initial presentation of cerebral hemorrhage in 50% of cases. They are not usually incidental findings. Capillary telangiectases are vascular malformations which usually are incidental findings.  (See References)

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C) this is a capillary telangiectasia

This answer is incorrect.


The photomicrograph shows an arteriovenous malformation. AVMs are masses of thick-walled blood vessels of varying caliber. They are associated with a 2/3 risk of clinically significant hemorrhage, are associated with a 2%-4% annual risk of acute hemorrhage, account for 1.5%-4% of all brain masses, and have an initial presentation of cerebral hemorrhage in 50% of cases.  (See References)

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D) patients with this type of lesion have an initial presentation of focal epilepsy in 1/3 of cases

This answer is incorrect.


The photomicrograph shows an arteriovenous malformation. AVMs are masses of thick-walled blood vessels of varying caliber. They are associated with a 2/3 risk of clinically significant hemorrhage, are associated with a 2%-4% annual risk of acute hemorrhage, account for 1.5%-4% of all brain masses, and have an initial presentation of cerebral hemorrhage in 50% of cases. One third of patients with cavernous angiomas present initially with focal epilepsy.  (See References)

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E) this type of lesion is associated with a 2/3 risk of clinically significant hemorrhage

This answer is correct.


The photomicrograph shows an arteriovenous malformation. AVMs are masses of thick-walled blood vessels of varying caliber. They are associated with a 2/3 risk of clinically significant hemorrhage, are associated with a 2%-4% annual risk of acute hemorrhage, account for 1.5%-4% of all brain masses, and have an initial presentation of cerebral hemorrhage in 50% of cases.  (See References)

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References:

1. Prayson, R.A., and Goldblum, J.R. (Eds.) (2005). Neuropathology. Elsevier, Philadelphia.
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pathology
Vascular Malformations 03
Question ID: 042807157
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 04/28/2007
Modified: 04/28/2007
Estimated Permutations: 151200

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