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

四肢や首の筋肉の弱さ、非常に強い筋肉痛や腫れ、頬やまぶた、首、胸、および四肢に影響を与える皮疹を伴う筋炎。進行状況と重症度は個人によって異なる。