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NBME 20 Answers

nbme20/Block 3/Question#19

A 23-year-old man comes to the physician because of ...

Area labeled ‘B’ (Mitochondrion)

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submitted by lianallado(0),

This patient presents with a mitochondrial myopathy since the disorder is inherited from the mother. Mitochondrial myopathies show “ragged red fibers” on muscle biopsy due to the accumulation of diseased mitochondria in the subsarcolemma of the muscle fiber.