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In a recent Viewpoint article (JAMA Neurol. 2024;81:789‒90), Okubadejo et al. raised concerns regarding two recent proposals for biological definitions and staging systems for synucleinopathies (the Neuronal Synuclein Disease Integrated Staging System and SynNeurGe system). While acknowledging these concerns, we provide an alternative perspective—that such frameworks represent important steps forward by allowing biologically defined populations to be targeted with precision treatments that can be accurately evaluated using stage-specific outcomes.
