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Pavel AM, Stephens CM, Mathieson SR, Walsh BH, McNamara B, McSweeney N, Boylan GB. Case Report: Electroencephalography in a neonate with isolated sulfite oxidase deficiency - a case report and literature review. HRB Open Res 2021; 4:122. [PMID: 34957373 PMCID: PMC8669778 DOI: 10.12688/hrbopenres.13442.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/12/2021] [Indexed: 11/30/2022] Open
Abstract
Isolated sulfite oxidase deficiency (ISOD) is a rare autosomal recessive neuro-metabolic disorder caused by a mutation in the sulfite oxidase (SUOX) gene situated on chromosome 12. Due to the deficiency of this mitochondrial enzyme (sulfite oxidase), the oxidative degradation of toxic sulfites is disrupted. The most common form of this disease has an early onset (classical ISOD) in the neonatal period, with hypotonia, poor feeding and intractable seizures, mimicking hypoxic-ischaemic encephalopathy. The evolution is rapidly progressive to severe developmental delay, microcephaly and early death. Unfortunately, there is no effective treatment and the prognosis is very poor. In this article, we described the evolution of early continuous electroencephalography (EEG) in a case of ISOD with neonatal onset, as severely encephalopathic background, with refractory seizures and distinct delta-beta complexes. The presence of the delta-beta complexes might be a diagnostic marker in ISOD. We also performed a literature review of published cases of neonatal ISOD that included EEG monitoring.
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Affiliation(s)
- Andreea M Pavel
- INFANT Research Centre, University College Cork, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland.,Department of Neonatology, Cork University Maternity Hospital, Cork, Ireland
| | - Carol M Stephens
- INFANT Research Centre, University College Cork, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland
| | - Sean R Mathieson
- INFANT Research Centre, University College Cork, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland
| | - Brian H Walsh
- INFANT Research Centre, University College Cork, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland.,Department of Neonatology, Cork University Maternity Hospital, Cork, Ireland
| | - Brian McNamara
- Department of Neurophysiology, Cork University Hospital, Cork, Ireland
| | - Niamh McSweeney
- Department of Paediatric Neurology, Cork University Hospital, Cork, Ireland
| | - Geraldine B Boylan
- INFANT Research Centre, University College Cork, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland
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