?:definition
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This myopathy is a childhood-onset X-linked myopathy with characteristics of slow progression of muscle weakness and unique histopathological findings. It has been described in about fifteen families The first manifestations appear typically in children around 5-10 years of age and include difficulty climbing stairs and running. Transmission is X-linked recessive; female carriers are asymptomatic or only mildly affected. The Xq28 locus has been associated with the disease.
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