Aortic pseudoaneurysm due to graft infection after invasive thymoma resection.

A 69-year-old woman with invasive thymoma underwent chemoradiotherapy followed by surgical resection, including extended thymectomy, right upper lobectomy, and innominate vein and superior vena cava reconstruction with a polytetrafluoroethylene graft. Computed tomography on the 27th postoperative day revealed mediastinitis and right hemothorax; open debridement and evacuation were performed. Vacuum-assisted closure was initiated to heal the median incision. The wound gradually cleared, and the vacuum was terminated on the 150th postoperative day. On the 155th postoperative day, the patient suffered a sudden hemorrhage from the anterior thoracic wall. Computed tomography revealed a ruptured ascending aortic pseudoaneurysm surrounding the graft.