This case involves a young man who presented with muscle weakness and difficulty lifting relatively light objects. He was diagnosed with polymyositis and given steroid treatment for the year following his diagnosis. During the course of his treatment, the man developed diabetes and cataracts as a result of long-term steroid use. After several months of treatment for his diabetes, the patient began to see a different physician who informed him he had been misdiagnosed with polymyositis. An expert in rheumatology was sought to opine on the standard of care when it comes to polymyositis diagnosis and the correct steroid dose treatment.