The majority held that the word 'fractures' in Structural Inclusion (2) of DRE Lumbosacral Category IV of the AMA Guides bears its ordinary meaning and is not used in a technical or specialised sense, so expert medical evidence is not admissible to qualify or restrict its meaning. Under Serwylo, multilevel fractures of any type — including transverse process fractures — per se constitute 'multilevel spine segment structural compromise' for the purposes of Category IV. Maxwell P's dissent, holding that expert evidence is admissible to construe technical medical language in the Guides, represents an alternative approach that may be revisited.
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