1. An Unusual Case of Extraskeletal Retroperitoneal Osteosarcoma Incidentally Detected by 18F-FDG PET/CT
   Giorgio Treglia et al, 2014, Nucl Med Mol Imaging CrossRef
2. Malignant phyllodes tumor with osteosarcomatous differentiation metastasizing to small bowel and causing intestinal obstruction
   Fatma N. Al-Rabiy et al, 2015, Diagnostic Histopathology CrossRef
3. Extraosseous Osteosarcoma of the Liver Demonstrated on 18F-FDG PET/CT Imaging
   Lei Jiang et al, 2016, Clinical Nuclear Medicine CrossRef
4. Intraperitoneal extraosseous osteosarcoma: a case report and literatures review
   Tiantian Wang et al, 2020, BMC Musculoskelet Disord CrossRef
5. Sclerosing encapsulating peritonitis causing fatal bowel obstruction
   Kylie Nabata et al, 2023, BMJ Case Rep CrossRef
6. Extraskeletal Osteosarcoma Misdiagnosed as Metastatic Breast Cancer: A Case Report
   Emmanuel T. Limpin et al, 2024, Surgery Case Reports CrossRef