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  • Title: Late form of Pompe disease with glycogen storage in peripheral nerves axons.
    Author: Fidziańska A, Ługowska A, Tylki-Szymańska A.
    Journal: J Neurol Sci; 2011 Feb 15; 301(1-2):59-62. PubMed ID: 21109266.
    Abstract:
    Pompe disease is caused by the deficiency of acid α-glucosidase (GAA), which degrades glycogen into glucose. Its manifestation is characterized by a broad and continuous spectrum of clinical severity ranging from severe infantile to relatively benign adult form. We describe a 12-year-old girl diagnosed at a presymptomatic stage of late form Pompe disease due to fortuitous detection of an elevated level of serum creatine kinase (CK) at the age of 4. Biopsies were taken from the quadriceps muscle and studied with histological and histochemical techniques, as well as in electron microscope. Sporadic muscle cells showed the accumulation of lysosomal glycogen, suggesting Pompe disease. Interestingly, we found lysosomal bound glycogen, located in the axons of intramuscular nerves. The diagnosis was confirmed by deficient GAA activity in leukocytes. Mutation analysis revealed changes IVS1-13T>G and p.C103G in the GAA gene. The patient was able to obtain enzyme replacement therapy in the early asymptomatic stage of the disease.
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