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Published in: European Radiology 2/2019

01-02-2019 | Head and Neck

Abnormalities of white and grey matter in early multiple system atrophy: comparison of parkinsonian and cerebellar variants

Authors: Santosh Kumar Dash, Albert Stezin, Tejashree Takalkar, Lija George, Nitish L Kamble, M Netravathi, Ravi Yadav, Keshav J. Kumar, Madhura Ingalhalikar, Jitender Saini, Pramod Kumar Pal

Published in: European Radiology | Issue 2/2019

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Abstract

Objective

Multiple system atrophy (MSA) is a neurodegenerative disorder with progressive motor and autonomic dysfunction. There is a paucity of information on the early neurostructural changes in MSA, especially its subtypes, MSA-P (patients with predominant parkinsonism) and MSA-C (patients with predominant cerebellar signs). This study investigates the abnormalities of grey matter (GM) and white matter (WM) in early MSA and its subtypes using multi-modal voxel-based analysis.

Materials and methods

Twenty-six patients with MSA with duration of symptoms ≤ 2.5 years (mean duration: 1.6 ±0.9 years) were assessed clinically and with 3T MRI. Voxel-based morphometry (VBM) and diffusion tensor imaging (DTI) were performed to identify the structural changes in MSA and its subtypes. The GM changes and diffusion parameters of WM tracts were correlated with the clinical scores. The results were compared with MRI of 25 age- and gender-matched healthy controls.

Results

The early structural changes in MSA included GM loss of the cerebellum and subcallosal gyrus with widespread involvement of supratentorial and infratentorial WM fibres. In MSA-C, GM loss was limited to the cerebellum with WM changes predominantly affecting the infratentorial WM and association tracts. In contrast, MSA-P did not demonstrate any GM loss and the WM involvement was mainly supratentorial. There was no significant correlation between structural changes and clinical severity score.

Conclusion

In early MSA, WM microstructure was more affected than GM. These changes were greater in MSA-C than in MSA-P, suggesting variable deterioration in the subtypes of MSA.

Key Points

• Structural changes in early multiple system atrophy were evaluated using multi-modal neuroimaging.
• White matter was more affected than grey matter in early MSA.
• Clinical variables did not correlate with early structural changes.
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Metadata
Title
Abnormalities of white and grey matter in early multiple system atrophy: comparison of parkinsonian and cerebellar variants
Authors
Santosh Kumar Dash
Albert Stezin
Tejashree Takalkar
Lija George
Nitish L Kamble
M Netravathi
Ravi Yadav
Keshav J. Kumar
Madhura Ingalhalikar
Jitender Saini
Pramod Kumar Pal
Publication date
01-02-2019
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 2/2019
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-018-5594-9

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