Abstract
A 17-year-old woman was admitted to our hospital because of chest pain with a rapidly enlarging mass arising in the anterior chest wall. Chest CT revealed a tumor 3 cm in diameter at the right anterior chest wall. Following incisional biopsy, the tumor was diagnosed as well-differentiated chondrosarcoma. Extended excision was performed and a pathologically free surgical margin was obtained. The pathological diagnosis of the resected specimen was chondrosarcoma (grade 1). The chest wall defect caused by the resection of the stemum and the ribs was reconstructed with artificial products and implantation of the pedunculated latissimus dorsi muscle and a skin flap. Thirty-three months have passed since the operation, and the patient is currently disease-free.