CASE 7: Osteosarcoma Located in the Pelvic Bone (Iliac Wing)

• 17-year-old female patient
• The patient presented with complaints of pain, swelling, and difficulty walking in the left hip.
• A needle biopsy performed on the patient revealed osteosarcoma, but subsequent scans did not detect metastases.
• Following three rounds of chemotherapy, the patient underwent extensive resection (internal hemipelvectomy) followed by reconstruction (hip transposition) with a modular tumor prosthesis.

Preoperative: X-ray shows a sclerotic mass completely covering the left iliac wing.

Preoperative: CT scan shows irregular and well-defined tumor tissue originating from the left iliac crest.

Pre-operative examination: The MRI shows tumor tissue in the same location, causing bone damage and extending into the soft tissue.

During the operation: The clinical appearance of the removed tumor tissue is shown.

During the operation: The image shows the suturing of the resulting cavity and tumor prosthesis to the sacrum with prolene mesh after internal hemipelvectomy.

Postoperative: The X-ray shows hip transposition achieved with tumor prosthesis after hemipelvectomy.