PMID: 12088089Jun 29, 2002Paper

Combined partial deficiencies of carnitine palmitoyltransferase II and mitochondrial complex I presenting as increased serum creatine kinase level

Journal of Child Neurology
Chang-Yong Tsao, Jerry R Mendell


Increased serum creatine kinase level is a marker of neuromuscular disorders. When combined with exercise intolerance, muscle cramps, fatigue, myoglobinuria, or muscle weakness, metabolic myopathies of a variety of causes should be considered. We encountered an adolescent male with a persistently high serum creatine kinase level and chronic fatigue who was found to have combined partial defects of carnitine palmitoyltransferase II and mitochondrial complex I. Metabolic myopathy may present with chronic fatigue and a persistently high serum creatine kinase level but without muscle weakness and may be attributable to combined enzyme defects.


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