Mitochondria1 encephalomyopathy with decreased succinate‐cytochrome c reductase activity

Abstract
Siblings (2) with a mitochondrial encephalomyopathy are reported. The syndrome was characterized by ataxia, intellectual impairment, myoclonic jerks, rare seizures and small stature. Muscle biopsy specimens showed abnormal accumulations of mitochondria and lipid droplets. Biochemical studies on muscle demonstrated decreased succinate-cytochrome c reductase activity in the mitochondrial respiratory chain.