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Muscle Nerve. 2009 Sep;40(3):469-71. doi: 10.1002/mus.21377.

Dermatomyositis with inclusion body myositis pathology.

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  • 1Department of Neurology, Box 0114, UCSF, University of California, San Francisco, California 94143, USA. rlayzer@sbcglobal.net


The pathogenic role of inflammation in inclusion body myositis (IBM) remains uncertain. A 63-year-old man developed a severe, rapidly progressive myopathy with clinical features typical of dermatomyositis (DM), but muscle pathology was typical of IBM. Treatment with prednisone and methotrexate resulted in complete remission of symptoms. Together with two similar cases reported previously, this case suggests that the inflammatory process of DM may trigger the pathologic changes of IBM.

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