Journal
RHEUMATOLOGY INTERNATIONAL
Volume 20, Issue 3, Pages 119-123Publisher
SPRINGER-VERLAG
DOI: 10.1007/s002960000084
Keywords
dermatomyositis; polymyositis; rheumatoid arthritis; coexistence; connective tissue disease; autoantibodies
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The association of polymyositis (PM) and rheumatoid arthritis (RA) is described in a 40-year-old female Mexican patient who was studied for a long period of time. The characteristic changes of PM that preceded the onset of RA for 7 years included proximal symmetrical muscle weakness, increased creatine kinase activity, and distinctive electromyography and muscle biopsy results. The occurrence of RA during the final 4 years of the Ii-year period was characterized by longlasting deforming and symmetric polyarthritis, high positive rheumatoid factor, subcutaneous nodules, and erosive joint changes. Through observation, myopathic changes other than those from PM were excluded. Joint changes other than from RA were also ruled out. A review of the literature revealed few specific reports of the coexistence of both diseases.
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