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skos:definition |
MSH: A mitochondrial disorder featuring the triad of chronic progressive EXTERNAL OPHTHALMOPLEGIA, cardiomyopathy (CARDIOMYOPATHIES) with conduction block (HEART BLOCK), and RETINITIS PIGMENTOSA. Disease onset is in the first or second decade. Elevated CSF protein, sensorineural deafness, seizures, and pyramidal signs may also be present. Ragged-red fibers are found on muscle biopsy. (Adams et al., Principles of Neurology, 6th ed, p984),NCI: A rare mitochondrial myopathy characterized by a progressive limitation of eye movements, leading to immobility and eye drop. It may be associated with muscle weakness, heart block, hearing loss, ataxia and short stature.
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