title: Mitochondrial cytopathy with lactic acidosis, carnitine deficiency and DeToni-Fanconi-Debré syndrome.
abstract: We reported a 6-year-old girl with mitochondrial cytopathy with lactic acidosis. The patient developed hypotonia, hearing loss, mental retardation, short stature, cataracta, hypoparathyroidism, DeToni-Fanconi-Debré syndrome and carnitine deficiency. Histological examination disclosed ragged red fibers and moderate lipid storage in skeletal muscle tissue and several structural abnormalities of mitochondria both in muscle tissue and proximal renal tubules. Biochemical examination of muscle tissue revealed a partial deficiency of pyruvate dehydrogenase complex and normal activities of cytochrome c oxidase, succinate cytochrome c reductase and NADH cytochrome c reductase. This is the first report of mitochondrial cytopathy representing DeToni-Fanconi-Debré syndrome associated with partial deficiency of pyruvate dehydrogenase complex and normal cytochrome c oxidase activity.
mesh_terms: D000140:Acidosis, Lactic / Q000150:complications*; D002331:Carnitine / Q000172:deficiency*; D003576:Electron Transport Complex IV / Q000378:metabolism; D005198:Fanconi Syndrome / Q000150:complications*; D005260:Female; D006801:Humans; D007223:Infant; D007668:Kidney / Q000473:pathology; D008928:Mitochondria; D009132:Muscles / Q000473:pathology; D009135:Muscular Diseases / Q000150:complications*; D009245:NADH Dehydrogenase / Q000378:metabolism; D015325:Pyruvate Dehydrogenase Complex Deficiency Disease; D013384:Succinate Cytochrome c Oxidoreductase / Q000378:metabolism
chemical_list: D013384:Succinate Cytochrome c Oxidoreductase; D009245:NADH Dehydrogenase; D003576:Electron Transport Complex IV; D002331:Carnitine