Development of polymyositis after long-standing rheumatoid arthritis.

Rohekar, Sherry; Rubin, Laurence · J Rheumatol · 2006

case_report · Level V

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Abstract

Rheumatoid arthritis (RA) and polymyositis (PM) are distinct clinical syndromes. The concurrent diagnoses of RA and PM in the same patient are rare. We describe a patient who developed outright PM after 16 years of well established RA, review the literature, and highlight the need to consider a broad base of differentials including PM in the diagnosis of muscle weakness in RA.

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