Pathogenic or Likely Pathogenic <scp> <i>GRN</i> </scp> Variants Are Found in 0.1% of Parkinson's Disease Patients

FTD-GRN may be indistinguishable from PD. Therefore, comprehensive genetic testing, including GRN analysis, is recommended for patients with clinically diagnosed parkinsonism/PD to guide disease management and prognosis. © 2025 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.