Limb-girdle muscular dystrophy type 2B misdiagnosed as polymyositis at the early stage: Case report and literature review

AbstractRationale:Dysferlin myopathy is an autosomal recessive hereditary muscular dystrophy due to deficiency of dysferlin caused by alteration of the DYSF gene; Limb-girdle muscular dystrophy type 2B (LGMD2B) is the most common in Its clinical phenotypes. However, LGMD2B is rarely seen in clinical