A 69-year-old man with diabetes mellitus (DM) visited the emergency department with chest pain for 4 days. He had suicidal history 6 months ago, using a knife to cut into his throat about 3 cm depth. An elevated body temperature (37.4°C) was detected. Electrocardiography showed sinus rhythm without ST or T wave changes, and chest computed tomography angiography (CTA) demonstrated no aortic dissection or pulmonary embolism. His blood test revealed mildly elevated C-reaction protein (CRP), without elevation …