Myalgic phenotype and preserved muscle strength in adult-onset acid maltase deficiency.

Abstract excerpt

Adult-onset acid maltase deficiency is a rare disorder characterized by progressive proximal muscle weakness and early respiratory insufficiency. We present a case of a 53-year-old woman who presented with several years of severe, diffuse myalgia and no evidence of weakness on examination. Further testing revealed a mildly elevated serum creatine kinase, a subtle vacuolar myopathy, decreased skeletal muscle...

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