Search for: [Abstract = "A 20\-year\-old patient with suspected Danon disease was examined.A biopsy of quadriceps sinister was performed.The vast majority of the muscle fibers did not reval ultrastructural changes. Muscule fibers were characterized by correct myofibril arrangement and the preserved sarcomers structure , some fal droplets were observed. Few mitochondria partially devoid of mitochondrial cristae were seen."]