Pollock-Flickinger score

Pollock-Flickinger score

AVM grading for radiosurgery

Classification

Formula

AVM score = 0.1 * volume + 0.02 * age + 0.5 * location

Parameter info

  • volume: in mL /cc
  • age: in years
  • location: superficial (hemispheric/corpus callosum/cerebellar) = 0; deep (basal ganglia/thalamus/ brainstem) = 1
  • Interpretation

    Chance (in %) of excellent outcome (with 95% CI)

  • AVM score ≤1.00: 89 (79-94)
  • AVM score 1.01 - 1.50: 70 (59-79)
  • AVM score 1.51 - 2.00: 64 (51-75)
  • AVM score >2.00: 46 (33-60)
  • Chance (in %) of modified Rankin Scale decline (with 95% CI)

  • AVM score ≤1.00: 0 (0-8)
  • AVM score 1.01 - 1.50: 13 (7-22)
  • AVM score 1.51 - 2.00: 20 (12-32)
  • AVM score >2.00: 36 (24-50)
  • Reference(s)

    Pollock BE, Flickinger JC. Modification of the radiosurgery-based arteriovenous malformation grading system. Neurosurgery 2008; 63:239-43.
    Last modified on August 1, 2016 by Pieter Kubben
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