Vascular Malformations 02

Topic: Pathology

Created on Saturday, April 28 2007 by jdmiles

Last modified on Saturday, April 28 2007.

 
        A) This type of lesion is associated with a 1% annual risk of acute hemorrhage
 
        B) Patients with this type of lesion have an initial presentation of focal epilepsy in 1/3 of cases
 
        C) This type of lesion consists of dilated capillaries separated by normal brain tissue
 
        D) Lesions of this type rarely become symptomatic
 
        E) This type of lesion accounts for 1.5%-4% of all brain masses
 

 

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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

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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) 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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C) this type of lesion consists of dilated capillaries separated by normal brain tissue

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. Capillary telangiectases consist of dilated capillaries separated by normal brain tissue.  (See References)

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D) lesions of this type rarely become symptomatic

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. Capillary telangiectases and venous angiomas are vascular malformations that rarely become symptomatic.  (See References)

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E) this type of lesion accounts for 1.5%-4% of all brain masses

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 02
Question ID: 042807149
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 04/28/2007
Modified: 04/28/2007
Estimated Permutations: 151200