Malformations Flashcards

1
Q

What is Cognard definitions used for?

A

Dural atriovenous malformations.

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2
Q

What is the meaning of Cognard typ 4?

A

Location of fistula:
-Cortical
Presence of cortical venous drainage:
-Yes. drains into cortical veins and not into sinus.
Direction of flow:
Does not need to be addressed for grade IV.
Presence of venous ectasia:
-Yes. Drainage WITH presence of venous ectasia.

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