Clinical and neuropathological picture of ethylmalonic aciduria - diagnostic dilemma
Ewa Jamroz1, Justyna Paprocka, Dariusz Adamek
1Child Neurology Department, Medical University of Silesia, Poland.
Abstract:
Increased ethylmalonic acid (EMA) in urine is a non-specific finding, and is observed in a number of inborn errors of metabolism, as well as in individuals who carry one of two common polymorphisms identified in the SCAD coding region. The authors present an 8-month-old girl with a suspicion of neuroinfection, although the clinical presentation led to diagnosis of ethylmalonic aciduria. From the neuropathological point of view the most remarkable changes were observed in the brain cortex, which was diffusely damaged practically in all regions of the brain. Of note, the most severe destruction was observed in the deepest regions of the sulci. The cortex of the affected regions showed no normal stratification and its structure was almost totally replaced by a form of "granulation tissue" with a markedly increased number of capillaries. To the authors' knowledge this is the first clinical report of ethylmalonic aciduria with brain autopsy findings.
Insights
Ethylmalonic aciduria, a metabolic disorder, can cause severe brain damage. This case report details the first neuropathological findings in a patient with ethylmalonic aciduria.
Area of Science:
- Biochemistry
- Neuropathology
- Metabolic Disorders
Background:
- Ethylmalonic acid (EMA) elevation in urine is a marker for various metabolic conditions and SCAD gene polymorphisms.
- Diagnosis of ethylmalonic aciduria can be challenging due to its non-specific nature.
Observation:
- An 8-month-old girl initially suspected of neuroinfection was diagnosed with ethylmalonic aciduria.
- Neuropathological examination revealed diffuse brain cortex damage, particularly severe in sulci depths.
Findings:
- Affected cortical regions displayed disrupted stratification and were replaced by granulation tissue with increased vascularity.
- This represents the first documented case of ethylmalonic aciduria with detailed brain autopsy findings.
Implications:
- Highlights the severe neuropathological consequences of ethylmalonic aciduria.
- Emphasizes the need for early diagnosis and understanding of metabolic disorders affecting the brain.
- Provides crucial data for future research into ethylmalonic aciduria pathogenesis and treatment.
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