Neurologic injury in isolated sulfite oxidase deficiency

Thomas M. Bosley, Ibrahim A. Alorainy, Darren T. Oystreck, Ali M. Hellani, Mohammed Z. Seidahmed, Mohamed El Faki Osman, Mohamed A. Sabry, Mohamed S. Rashed, Eiman A. Al-Yamani, Khaled K. Abu-Amero, Mustafa A. Salih

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Background: We review clinical, neuroimaging, and genetic information on six individuals with isolated sulfite oxidase deficiency (ISOD). Methods: All patients were examined, and clinical records, biochemistry, neuroimaging, and sulfite oxidase gene (SUOX) sequencing were reviewed. Results: Data was available on six individuals from four nuclear families affected by ISOD. Each individual began to seize within the first week of life. neurologic development was arrested at brainstem reflexes, and severe microcephaly developed rapidly. neuroimaging within days of birth revealed hypoplasia of the cerebellum and corpus callosum and damage to the supratentorial brain looking like severe hypoxic-ischemic injury that evolved into cystic hemispheric white matter changes. Affected individuals all had elevated urinary S-sulfocysteine and normal urinary xanthine and hypoxanthine levels diagnostic of ISOD. Genetic studies confirmed SUOX mutations in four patients. Conclusions: ISOD impairs systemic sulfite metabolism, and yet this genetic disease affects only the brain with damage that is commonly confused with the clinical and radiologic features of severe hypoxic-ischemic encephalopathy.

Original languageEnglish (US)
Pages (from-to)42-48
Number of pages7
JournalCanadian Journal of Neurological Sciences
Issue number1
StatePublished - Jan 1 2014
Externally publishedYes

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology


Dive into the research topics of 'Neurologic injury in isolated sulfite oxidase deficiency'. Together they form a unique fingerprint.

Cite this