Diseases caused by abnormal function of the MITOCHONDRIA. They may be caused by mutations, acquired or inherited, in mitochondrial DNA or in nuclear genes that code for mitochondrial components. They may also be the result of acquired mitochondria dysfunction due to adverse effects of drugs, infections, or other environmental causes.

Synonyms: Mitochondrial Disorder, Mitochondrial Disease, Respiratory Chain Deficiencies, Mitochondrial, Phosphorylation Deficiencies, Oxidative, Disorder, Mitochondrial, Oxidative Phosphorylation Deficiencies, Respiratory Chain Deficiency, Mitochondrial Diseases, Mitochondrial Respiratory Chain Deficiencies, Deficiency, Oxidative Phosphorylation, Electron Transport Chain Deficiencies, Mitochondrial, Deficiencies, Oxidative Phosphorylation, Mitochondrial Electron Transport Chain Deficiencies, Deficiency, Respiratory Chain, Disease, Mitochondrial, Oxidative Phosphorylation Deficiency, Phosphorylation Deficiency, Oxidative, Disorders, Mitochondrial, Deficiencies, Respiratory Chain, Mitochondrial Disorders