L-2 Hydroxyglutaric Aciduria: Magnetization Transfer Contrast and Diffusion Weighted Magnetic Resonance Imaging...

Area of Science:

• Neurology
• Radiology
• Metabolic Disorders

Background:

• ù aciduria is a rare metabolic disorder with variable neurological manifestations.
• Neuroimaging plays a crucial role in understanding the pathophysiology of ù aciduria.

Purpose of the Study:

• To report previously undocumented magnetic resonance imaging (MRI) findings in a pediatric patient with ù aciduria.
• To characterize diffusion and magnetization transfer properties in specific brain regions.

Main Methods:

• Conventional MRI and diffusion-weighted imaging (DWI) were performed.
• Magnetization transfer (MT) contrast imaging was utilized.
• Analysis focused on myelinated regions, dentate nuclei, and white matter tracts.

Main Results:

• Observed near-complete sparing of early myelinated regions on conventional MRI and DWI.
• Identified restricted diffusion in the dentate nuclei.
• MT contrast revealed normal values in early myelinated regions but abnormal values in subcortical temporal white matter, internal capsule, and globus pallidus.

Conclusions:

• The neuroimaging findings in this case of ù aciduria are distinct and expand the known spectrum of the disorder.
• Specific patterns of white matter involvement and basal ganglia changes were identified using advanced MRI techniques.
• These findings may aid in the diagnosis and monitoring of ù aciduria.