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The long term prognosis for people with polymyositis is highly variable. Some people experience only mild weakness and respond well to treatment. Others experience a rapid progression of symptoms and do not respond to any therapy. Rarely, people with polymyositis recover spontaneously without any treatment. People with polymyositis tend to have a better outcome if they receive treatment right away, have mild muscle weakness, have no difficulty swallowing, and have no signs of disease in other organ systems such as the heart and lungs.
Last updated: 10/31/2011