Search for: [Abstract = "A 4\-year\-old patient was examined. A biceps sinister biopsy was performed.Muscle fibers showing signs of damage, necrosis, serious rupture of the contractile apparatus, char\-acterised by presence of completely destroyed mitochondria and numerous vacuoles were seen.Electron microscopy analysis revealed also abnormalities in the structure of cell nuclei. Abundant connective tissue was observed."]

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