| A rare mitochondrial oxidative phosphorylation disorder with complex I and IV deficiency. The disease has characteristics of lactic acidosis, hypotonia, hypertrophic cardiomyopathy and global developmental delay. Other clinical features include feeding difficulties, failure to thrive, seizures, optic atrophy and ataxia. Caused by homozygous or compound heterozygous mutation in the MTO1 gene on chromosome 6q13. |
