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MERRF syndrome
MERRF syndrome (or Myoclonic Epilepsy with Ragged Red Fibers) is a mitochondrial disease. It is extremely rare, with an estimated prevalence of 1/400,000 in Northern Europe, and has varying degrees of expressivity owing to heteroplasmy.〔(Gene Reviews: MERRF )〕 ==Presentation== It involves the following characteristics: * progressive myoclonic epilepsy * "''Ragged Red Fibers''" - clumps of diseased mitochondria accumulate in the subsarcolemmal region of the muscle fiber and appear as "Ragged Red Fibers" when muscle is stained with modified Gömöri trichrome stain * short stature * hearing loss * lactic acidosis * exercise intolerance * poor night vision
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「MERRF syndrome」の詳細全文を読む
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