Deficiency in complex II of the respiratory chain, presenting as a leukodystrophy in two sisters with Leigh syndrome

Brain Dev. 1992 Nov;14(6):404-8. doi: 10.1016/s0387-7604(12)80349-4.


We report 2 sisters with a degenerative neurological disorder presenting clinically as a leukodystrophy. CT scan and MRI demonstrated small symmetrical foci of necrosis in the substentia nigra and in the basal ganglia typical of Leigh syndrome and diffuse cerebral white matter abnormalities. In these patients a deficiency in complex II of the respiratory chain was demonstrated in isolated mitochondria from muscle, as well as in fibroblasts and lymphocytes.

Publication types

  • Case Reports

MeSH terms

  • Brain / diagnostic imaging*
  • Brain / pathology*
  • Electron Transport Complex II
  • Female
  • Fibroblasts / enzymology
  • Humans
  • Infant
  • Leigh Disease / diagnostic imaging
  • Leigh Disease / enzymology*
  • Leigh Disease / pathology
  • Lymphocytes / enzymology
  • Magnetic Resonance Imaging
  • Mitochondria, Muscle / enzymology
  • Multienzyme Complexes / deficiency*
  • Oxidoreductases / deficiency*
  • Succinate Dehydrogenase / deficiency*
  • Tomography, X-Ray Computed


  • Multienzyme Complexes
  • Oxidoreductases
  • Electron Transport Complex II
  • Succinate Dehydrogenase