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  • Title: [Rhabdomyolysis in carnitine palmitoyltransferase II deficiency: developments in pathophysiology, diagnosis and therapy].
    Author: Imoberdorf R, Krähenbühl S, Krapf R.
    Journal: Schweiz Med Wochenschr; 1998 Jun 20; 128(25):1024-9. PubMed ID: 9691338.
    Abstract:
    In hospitalized patients rhabdomyolysis is an important clinical entity, leading to myoglobinuria and acute renal failure in 8-25% of cases. When common causes of rhabdomyolysis, such as crush, trauma, infections, and drug abuse are excluded, inherited disorders of energy metabolism, in particular lipid metabolism, should be considered. Carnitine palmitoyltransferase (CPT) II deficiency is a common disorder of mitochondrial lipid oxidation. There are two distinct clinical forms: a severe and usually fatal infantile form and a benign classical muscular form. Usually, patients with CPT II deficiency present with episodic myoglobinuria, muscle cramps and weakness prompted by strenuous exercise or prolonged fasting. Liver and cardiac dysfunction are rarely seen and indicate severe disease. Most affected patients are males, although CPT II deficiency shows an autosomal recessive mode of inheritance. The human CPT II gene has been cloned, sequenced and localised to chromosome 1p32. Several mutations have been detected in the human gene which differ in the remaining enzyme activity and may explain the heterogeneity in the clinical picture of this disorder. Diagnosis is by muscle biopsy. Normally, light microscopy shows no pathological findings, and diagnosis must be established by biochemical and molecular methods. In our report on two typical cases we set out to promote knowledge of this disorder and discuss the diagnostic approach, which requires a specialised laboratory.
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