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Neuroimaging of mitochondrial disorders
Richard Haas1, Rosalind Dietrich
1Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA. rheas@ucsd.edu
Mitochondrion
|August 27, 2005
Summary
Mitochondrial diseases often affect the central nervous system, showing characteristic brain lesions on MRI. This study details these imaging features and proposes a severity scoring system for better diagnosis.
Area of Science:
- Neurology
- Radiology
- Genetics
Background:
- Mitochondrial disease is a multisystem disorder frequently impacting the central nervous system.
- Characteristic neuroimaging findings include T2 hyperintense lesions, atrophy, and involvement of deep brain structures.
Purpose of the Study:
- To detail the magnetic resonance imaging (MRI) features of mitochondrial diseases.
- To propose a scoring technique for assessing brain involvement severity and extent.
Main Methods:
- Detailed description of neuroimaging findings across the spectrum of mitochondrial diseases.
- Development of a scoring system for brain involvement.
Main Results:
- Imaging findings are diverse but often include focal T2 hyperintensities (evident on FLAIR) and atrophy, particularly in deep brain structures.
- A scoring technique for severity and extent of brain involvement is suggested.
- Limited correlation exists between molecular defects and imaging findings, with exceptions like MELAS syndrome.
Conclusions:
- MRI is valuable in supporting the clinical diagnosis of mitochondrial diseases.
- The proposed scoring technique may aid in standardizing the assessment of neurological involvement.
- Understanding imaging patterns is crucial for managing this complex group of disorders.