CASE 13: Ewing Sarcoma Located in the Right Iliac Wing

• 12-year-old male patient
• The patient presented with difficulty walking due to pain and swelling in the right pelvis.
• A patient diagnosed with Ewing sarcoma via needle biopsy following the detection of a mass in the iliac crest showed no signs of metastasis in subsequent scans.
• Internal hemipelvectomy and reconstruction with fibula and lumbopelvic fixation were performed following neoadjuvant chemotherapy.

Preoperative examination: X-ray shows irregularity in the right iliac crest, and CT scan shows bone damage and periosteal reaction.

Preoperative: MRI shows tumor tissue accompanied by a soft tissue mass in the right iliac wing.

During the operation: The image shows the preservation of neurovascular structures after resection, and reconstruction using the fibula and rod/screw.

During the operation: Clinical and fluoroscopy view of the resected tissue.

Postoperative: The image shows lumbopelvic fixation with fibula and rod/screw after internal hemipelvectomy.