What is the difference between polymyositis and dermatomyositis?

Polymyositis manifests as progressive symmetric proximal muscle weakness whereas dermatomyositis involves muscle weakness as well as a skin rash.

Skin rash in dermatomyositis presents as a malar rash, Gottron papules, erythematous periorbital rash (helioptrope rash), shawl and face rash, and mechanic’s rash.

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This post was written by Kelly Clinning