Abstract
Glutaric aciduria type 1 is an inborn error of lysine, hydroxylysine, and tryptophan metabolism caused by deficiency of glutaryl-coenzyme A dehydrogenase. The disease often appears in infancy with an encephalopathic episode that results in acute basal ganglia and white matter degeneration. The neuroimaging findings in glutaric aciduria type 1 have been well defined. However, the changes in magnetic resonance spectroscopy, a noninvasive tool for identifying the biochemical state of the brain, are scarce in glutaric aciduria type 1. This report presents the magnetic resonance spectroscopy findings in a 19-month-old male with glutaric aciduria type 1. Magnetic resonance spectroscopy of right frontal white matter and right lentiform nuclei revealed decreased N-acetylaspartate/creatine ratio, slightly increased choline/creatine ratio, and increased myoinositol/creatine ratio, compared with the age-matched control patients. We thought that these changes were in accordance with neuroaxonal damage, demyelination, and astrocytosis in these areas. In conclusion, proton magnetic resonance spectroscopy provides a tool for assessing metabolic disturbances and the extent of brain damage noninvasively in glutaric aciduria type 1.
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