MRS features during encephalopathic crisis period in 11 years old case with GA-1

Area of Science:

• Biochemistry
• Neurology
• Medical Imaging

Background:

• Glutaric aciduria type-1 (GA-1) is an inherited disorder of amino acid metabolism, primarily affecting children.
• While MRI findings are established, advanced neuroimaging in older GA-1 patients is less understood.

Observation:

• This study reports on an 11-year-old patient experiencing an encephalopathic crisis due to GA-1.
• Advanced neuroimaging, including Diffusion-Weighted Imaging (DWI) and Magnetic Resonance Spectroscopy (MRS), was performed.

Findings:

• DWI revealed diffusion restrictions in the basal ganglia, corpus callosum, and periventricular white matter.
• MRS showed altered metabolite ratios (increased Cho/Cr, MI/Cr; decreased NAA/Cr) in affected brain regions.
• An inverted double lactate peak and an unidentified peak possibly indicating amino acid degradation products were observed.

Implications:

• These findings expand the understanding of advanced neuroimaging in late-onset GA-1.
• Advanced DWI and MRS can aid in diagnosing and characterizing GA-1, even in older individuals presenting with acute crises.
• Further research into the unidentified MRS peak could offer new insights into GA-1 pathophysiology.