| A rare genetic mitochondrial oxidative phosphorylation disorder with characteristics of a highly variable phenotype which ranges from a fatal neonatal/infantile encephalomyopathy with lactic acidosis, hyporeflexia/areflexia, severe hypotonia and respiratory failure to less severe cases presenting with central hypotonia, global developmental delay, congenital sensorineural hearing loss and renal disease. Additional variably observed clinical features include intellectual disability, seizures, and cardiomyopathy. Caused by homozygous or compound heterozygous mutation in the RMND1 gene on chromosome 6q25. |