Search for: [Abstract = "A 11\-year\-old patient was examined. Biceps biopsy was performed. Electronmicroscopy analysis revealed ultrastructurally unchanged myofibres and normal structure of mitochondria \(Fig. 1.\) Large amount of collagen was observed around the capillary vessels \(Fig. 2,3\), at Fig.4 also a lymphocyte was present. Fat droplets were visible in the capillaries, and again, abundant connective tissue around the vessels was seen \(Fig. 5,6\)."]