부산대학교 도서관

We herein report a case of spontaneous regression of thymic cancer diagnosed after thoracic injury. Case: A 54-year-old male, who had sustained multiple fractures and pneumohemothorax, was referred to our hospital for follow-up after thoracic injury. Chest computed tomography revealed a nodular tumor, 29 mm in diameter, in the left anterior mediastinum at the time of injury. Three months later, the nodule had regressed to a size of 18 mm in diameter. The accumulation of fluorodeoxyglucose was observed in the nodule by positron emission tomography. We diagnosed the patient with a thymic epithelial tumor and performed thymectomy. On intraoperative examination of the frozen section, the nodule was diagnosed as a thymoma. Histopathological examination of the resected specimen revealed a thymic carcinoma. The patient received four cycles of combined platinum chemotherapy as adjuvant therapy and is currently disease-free at 12 months postoperatively. Even if a tumor regresses in size during follow-up, careful observation is required.