General neurologists guide for diagnosis of atypical parkinsonian disorders

This consensus statement provides a practical diagnostic framework to help general neurologists identify atypical parkinsonian disorders (APDs), such as progressive supranuclear palsy and multiple system atrophy. Because these conditions often mimic Parkinson’s disease but progress more rapidly and respond poorly to standard treatments, the authors offer an iterative algorithm based on clinical history, neurological exams, and non-contrast brain MRI. The guidelines highlight specific red flags—including early falls, eye movement abnormalities, and autonomic dysfunction—to facilitate earlier diagnosis and better patient support. By streamlining the evaluation process, the source aims to reduce diagnostic delays and avoid unnecessary testing while clarifying when to seek specialized tertiary referrals. The overview also addresses rare APDs and emerging biomarkers to ensure clinicians remain current with evolving scientific understandings.