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Cytochrome oxidase deficiency presenting as birth asphyxia
T A Willis1, J Davidson, R G Gray
1Department of Paediatric Neurology, University of Birmingham, UK.
Developmental Medicine and Child Neurology
|June 30, 2000
Summary
Hypoxic-ischaemic encephalopathy (HIE) in an infant was linked to acidosis and later confirmed as cytochrome oxidase deficiency. This rare inborn respiratory chain disorder presents as a static encephalopathy, highlighting its importance in HIE differential diagnoses.
Area of Science:
- Biochemistry
- Neurology
- Genetics
Background:
- Hypoxic-ischaemic encephalopathy (HIE) is a serious neonatal condition often associated with birth complications.
- Acidosis is a common clinical finding in infants experiencing hypoxic-ischaemic events.
- Differential diagnosis of HIE is crucial for appropriate management and understanding prognosis.
Observation:
- An infant diagnosed with HIE presented with acidosis.
- Further investigations at 7 weeks revealed abnormal neuroimaging (CT and MRI) and elevated lactate levels in plasma and cerebrospinal fluid (CSF).
- A skeletal-muscle biopsy at 2 months confirmed a diagnosis of cytochrome oxidase deficiency.
Findings:
- Cytochrome oxidase deficiency, an inborn error of the respiratory chain, was identified as the underlying cause.
- The patient's condition evolved into a static encephalopathy, consistent with cerebral palsy.
- Elevated lactate levels served as a key indicator for mitochondrial dysfunction.
Implications:
- Inborn disorders of the respiratory chain, such as cytochrome oxidase deficiency, should be considered in the differential diagnosis of HIE.
- Early identification of these genetic metabolic disorders is vital for potential interventions and genetic counseling.
- This case underscores the link between mitochondrial dysfunction and neonatal neurological injury.