Fig. 3

A CT findings in case 3. CT revealed a subcutaneous low-density mass (red arrow) sized 20 × 23 mm in the center of the median sternotomy, continuous with a 14-mm-wide area of fluid collection (blue arrow) around the ascending aortic graft. The gap of the closed sternum was also visualized (yellow arrow). B Chart for recording case 3 patient body temperature and C-reactive protein level. Shown is the chart of body temperature (red point) and C-reactive protein levels (green point) recorded during hospitalization. No fever was noted during hospitalization, and the C-reactive protein level remained stable without antibiotic therapy. C CT findings 1 month after initial treatment with aspiration drainage. The subcutaneous tumor had disappeared