mitochondrial disease true https://www.epilepsydiagnosis.org/aetiology/metabolic-groupoverview.html#mitochondrial MONDO:0044970 Mitochondrial diseases (MIDs) are a large group of heterogeneous disorders due to mutations in either mitochondrial DNA (mtDNA) or nuclear DNA (nDNA) genes, the latter encoding proteins involved in mitochondrial function. metabolic etiology