dermatomyositis myositis characterized by weakness of limb and neck muscles and much muscle pain and swelling accompanied by skin rash affecting cheeks and eyelids and neck and chest and limbs; progression and severity vary among individuals
polymyositis myositis characterized by weakness of limb and neck muscles and much muscle pain and swelling; progression and severity vary among individuals
inclusion body myositis myositis characterized by weakness of limb muscles (especially the thighs and wrists and fingers); sometimes involves swallowing muscles; onset after 50 and slowly progressive; seen more often in men than in women
