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  • Title: Cardiomyopathy, mental retardation, and autophagic vacuolar myopathy. Abnormal MRI findings in the head.
    Author: Kashio N, Usuki F, Akamine T, Nakagawa S, Higuchi I, Nakahara K, Okada A, Osame M, Murata F.
    Journal: J Neurol Sci; 1991 Sep; 105(1):1-5. PubMed ID: 1795162.
    Abstract:
    A 21-year-old man with childhood-onset mental retardation, non-obstructive hypertrophic cardiomyopathy, and vacuolar myopathy is presented. A histopathological study of biopsied skeletal muscle showed lysosomal glycogen storage mimicking acid maltase deficiency, but biochemical analysis showed normal acid alpha-glucosidase activity. Glycogenosomes were also recognized in endothelial cells on electronmicroscopic examination of biopsied skeletal muscle. Magnetic resonance imaging (MRI) findings in the head revealed the involvement of the central nervous system. This is a new type of lysosomal glycogen storage disease with multisystemic involvement. The specific biochemical defect in this disorder remains to be elucidated.
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