Low-grade central osteosarcoma (LGCOS), a rare type of osteosarcoma, often has misleading radiological and pathological features that overlap with those of other bone tumours, thereby complicating diagnosis and treatment. We aimed to analyze the clinical, radiological, and pathological features of patients with LGCOS, with a focus on diagnosis, treatment, and outcomes. We retrospectively analyzed the medical records of 49 patients with LGCOS (Broder’s grade 1 to 2) treated between January 1985 and December 2017 in a single institute. We examined the presence of malignant features on imaging (periosteal reaction, cortical destruction, soft-tissue invasion), the diagnostic accuracy of biopsy, surgical treatment, and oncological outcome.Aims
Methods
To evaluate outcome and complications of knee arthrodesis with a modular prosthetic system (MUTARS(r) Implantcast), as primary and revision implants in musculoskeletal oncology. Between 1975 and 2009, 24 prostheses were used for knee arthrodesis. Nineteen in oncologic cases: 6 osteosarcomas, chondrosarcoma, synovial sarcoma and metastatic carcinoma 3 each, 2 pigmented villonodular synovitis (PVNS), malignant fibrous hystiocitoma and giant cell tumour 1 each. Patients were grouped into: A) primary implants, B) revision implants. Group A included 9 patients: 8 arthrodeses after extra-articular resection with major soft tissue removal, 1 after primary resection following multiple excisions of locally recurrent PVNS. Group B included 15 patients: 12 arthrodeses for infection (5 infected TKAs, 7 infected megaprostheses), 2 for failures of temporary arthodesis with Kuntscher nail and cement, 1 for recurrent chondrosarcoma in previous arthrodesis.Aim
Method
