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Each regained her muscle strength, and serum enzymes normalized with thyroid hormone replacement. Because muscle weakness and an elevated creatine phosphokinase occur in most patients with hypothyroidism, thyroid dysfunction must be considered in the differential diagnosis of polymyositis.<\/jats:p>","DOI":"10.1002\/art.1780190621","type":"journal-article","created":{"date-parts":[[2007,2,14]],"date-time":"2007-02-14T17:40:05Z","timestamp":1171474805000},"page":"1363-1366","source":"Crossref","is-referenced-by-count":51,"title":["Hypothyroidism presenting as a polymyositis\u2010like syndrome. 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