Polymyositis
Medical condition / From Wikipedia, the free encyclopedia
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Not to be confused with poliomyelitis.
Polymyositis (PM) is a type of chronic inflammation of the muscles (inflammatory myopathy) related to dermatomyositis and inclusion body myositis. Its name means 'inflammation of many muscles' (poly- + myos- + -itis). The inflammation of polymyositis is mainly found in the endomysial layer of skeletal muscle, whereas dermatomyositis is characterized primarily by inflammation of the perimysial layer of skeletal muscles.[1]
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Polymyositis | |
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Micrograph of polymyositis. Muscle biopsy. H&E stain. | |
Specialty | Rheumatology |
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