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Grading

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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There is a systematic grading system for the degree of clinical severity of an AV malformation:

  • eloquent areas affected - for example motor or speech areas affected - score 1, otherwise 0
  • venous drainage - superficial score 0, deep score 1
  • size - less than 3cm score 1, 3 to 6cm score 2, greater than 6 cm score 3.

The maximum score is 5; low grades = 1-3

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