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Streptococcal myositis is an extremely uncommon infectious disease caused by Group A streptococcus (GAS). GAS infection spreads rapidly and diffusely through the muscle, resulting in edema and necrosis. Consequently, it results in streptococcal toxic shock syndrome having extremely high mortality. We report a 42 year-old female patient with systemic lupus erythe- matosus accompanying with streptococcal myositis who initially presented with fever, severe pain, and tenderness on the calf. Her systemic toxic symptoms were aggravated and finally she died of the disease in spite of aggressive management.
Key Words: Myositis, Streptococcus, Systemic lupus erythematosus
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