Vascular Malformations 06

Topic: Pathology

Created on Thursday, November 29 2007 by jdmiles

Last modified on Thursday, November 29 2007.

 
        A) Lesions of this type rarely become symptomatic
 
        B) This is an arteriovenous malformation
 
        C) Lesions of this type are dilated veins of the superficial or subcortical vasculature
 
        D) This type of lesion is associated with a 1% annual risk of acute hemorrhage
 
        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 November 29, 2007 by jdmiles.
This question was last modified on November 29, 2007.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS

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A) lesions of this type rarely become symptomatic

This answer is incorrect.

This photomicrograph shows a cavernous angioma. Cavernous angiomas are most often seen in young adults, and 1/3 of cases present with focal seizures. There is an approximately 1% annual risk of hemorrhage with this type of lesion. Microscopically, cavernous angiomas appear as clusters of dilated, thin-walled blood vessels with no brain tissue in between. Unlike AVMs, there is no arterial component.  (See References)

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B) this is an arteriovenous malformation

This answer is incorrect.

This photomicrograph shows a cavernous angioma. Cavernous angiomas are most often seen in young adults, and 1/3 of cases present with focal seizures. There is an approximately 1% annual risk of hemorrhage with this type of lesion. Microscopically, cavernous angiomas appear as clusters of dilated, thin-walled blood vessels with no brain tissue in between. Unlike AVMs, there is no arterial component.  (See References)

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C) lesions of this type are dilated veins of the superficial or subcortical vasculature

This answer is incorrect.

This photomicrograph shows a cavernous angioma. Cavernous angiomas are most often seen in young adults, and 1/3 of cases present with focal seizures. There is an approximately 1% annual risk of hemorrhage with this type of lesion. Microscopically, cavernous angiomas appear as clusters of dilated, thin-walled blood vessels with no brain tissue in between. Unlike AVMs, there is no arterial component.  (See References)

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

This answer is correct.

This photomicrograph shows a cavernous angioma. Cavernous angiomas are most often seen in young adults, and 1/3 of cases present with focal seizures. There is an approximately 1% annual risk of hemorrhage with this type of lesion. Microscopically, cavernous angiomas appear as clusters of dilated, thin-walled blood vessels with no brain tissue in between. Unlike AVMs, there is no arterial component.  (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 incorrect.

This photomicrograph shows a cavernous angioma. Cavernous angiomas are most often seen in young adults, and 1/3 of cases present with focal seizures. There is an approximately 1% annual risk of hemorrhage with this type of lesion. Microscopically, cavernous angiomas appear as clusters of dilated, thin-walled blood vessels with no brain tissue in between. Unlike AVMs, there is no arterial component.  (See References)

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References:

1. Prayson, R.A., and Goldblum, J.R. (Eds.) (2005). Neuropathology. Elsevier Churchill Livingstone, Philadelphia. (ISBN:0443066582)

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pathology
Vascular Malformations 06
Question ID: 112907112
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 11/29/2007
Modified: 11/29/2007
Estimated Permutations: 297000