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A 32-year-old patient with suspected myopathy was examined. A quadriceps biopsy was performed. Electron microscopy analysis revealed unchanged muscle fibers structure, however, numerous structures of various diameter, some of them containing glycogen were present (probably mitochondrial remains) (Fig 1,2,3). In some fibers mitochondria were characterized by blurred structure of mitochondrial cristae or were almost completely devoid of cristae. They were swollen and characterized by bright mitochondrial matrix. (Fig 4,5).
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Operational Program Digital Poland, 2014-2020, Measure 2.3: Digital accessibility and usefulness of public sector information; funds from the European Regional Development Fund and national co-financing from the state budget.