The patient is a 61-year-old male who underwent coronary artery bypass grafting in a foreign hospital at the end of December 2014 for “coronary atherosclerotic heart disease”, and the operation went well. In July 18, 2015, a CT examination of the chest was performed at the local hospital, suggesting that the sternum showed chronic inflammatory changes; the patient was recently admitted to the Aviation General Hospital of China Medical University for examination: a surgical scar of about 875px in length could be seen in the middle of the chest, and four ruptures could be seen in the lower part of the incision, with a diameter of about 0.5-25px in size, with slight redness and swelling around the periphery, no obvious purulent discharge could be detected. Sternal surface, diagnosis: 1, chronic sternal osteomyelitis; 2, chest incision infection with skin sinus tract formation; 3, post coronary artery bypass grafting. The patient underwent surgical treatment under general anesthesia after preoperative preparation: chest wall and mediastinal infection debridement, wire removal, dead bone removal, sinus tract removal, pectoralis major muscle flap transfer, mediastinal drainage, and postoperative wound healing in one stage, and was recently discharged. The postoperative wound healed in one stage and was recently hospitalized. The before-and-after comparison is as follows.