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Clinical features, MRI, and 18F-FDG-PET in differential diagnosis of Parkinson disease from multiple system atrophy

Ping Zhao1, Benshu Zhang2, Shuo Gao3

  • 1Department of Neurology, Second Hospital of Tianjin Medical University, Tianjin, China.

Brain and Behavior
|September 17, 2020
PubMed
Abstract

Insights

This study differentiates Parkinson's Disease (PD), MSA-P, and MSA-C using clinical data, MRI, and 18F-FDG-PET scans. Findings reveal distinct patterns in symptoms, atrophy, and metabolism for accurate diagnosis.

Area of Science:

  • Neuroscience
  • Medical Imaging
  • Clinical Neurology

Background:

  • Parkinson's Disease (PD) and Multiple System Atrophy (MSA) present overlapping symptoms, complicating differential diagnosis.
  • Distinguishing between PD, MSA with predominant Parkinsonism (MSA-P), and MSA with predominant cerebellar features (MSA-C) is crucial for appropriate treatment and management.
  • Current diagnostic methods often lack definitive markers, necessitating advanced imaging and metabolic assessments.

Purpose of the Study:

  • To differentiate between Parkinson's Disease (PD), MSA-P, and MSA-C.
  • To analyze variations in clinical characteristics, MRI findings, and 18F-FDG-PET glucose metabolism for diagnostic distinctions.
  • To establish a new basis for the differential diagnosis of these neurodegenerative conditions.

Main Methods:

  • Clinical data collection from 30 PD, 22 MSA-P, and 28 MSA-C patients.
  • Magnetic Resonance Imaging (MRI) analysis for structural abnormalities.
  • 18F-FDG-PET scans to assess regional glucose metabolism in subsets of patients (20 PD, 11 MSA-P, 13 MSA-C).

Main Results:

  • Clinical features like resting tremor, bradykinesia, and postural instability were predominant in PD, MSA-P, and MSA-C, respectively.
  • MRI revealed characteristic patterns: putaminal atrophy and hyperintensive rim in MSA-P; cerebellar atrophy and 'hot cross bun' sign in MSA-C.
  • 18F-FDG-PET showed decreased metabolism in the parietal area (PD), bilateral putamen (MSA-P), and bilateral cerebellum (MSA-C).

Conclusions:

  • Distinct clinical, MRI, and 18F-FDG-PET metabolic patterns were identified for PD, MSA-P, and MSA-C.
  • These findings provide a robust foundation for improving the differential diagnosis of these challenging neurodegenerative diseases.
  • The study highlights the synergistic value of combining clinical assessment with advanced imaging techniques for accurate patient stratification.
Keywords:
18F-FDG-PETMRIParkinson's diseasedifferential diagnosismultiple system atrophyneurodegenerative disease

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