Abstract
This case report presents a 15-year-old boy with extraosseous Ewing's sarcoma who initially experienced right chest wall pain and fever. Imaging revealed a soft-tissue mass with ring-like enhancement and mild rib destruction. Thoracoscopic resection was performed, and paraffin pathology confirmed the diagnosis of extraosseous Ewing's sarcoma. The patient had a smooth postoperative recovery. This case highlights the diagnostic challenges and therapeutic strategies associated with Ewing's sarcoma and emphasizes the importance of early and accurate diagnosis to improve clinical outcomes.