“…It is a rare condition and its incidence is approximately 1.64/ 100,000/year 15) . Precipitating factors include infectious diseases, connective tissue diseases, immunizations/medications, pregnancy, and surgical operations; however, approximately 54% of patients have no known precipitating factors 10,11,15,19) . Diagnosis is based on the patient's medical history, clinical symptoms, and physical examination results 14,22) .…”