OUTCOME OF PATHOLOGICAL FRACTURES OF THE PROXIMAL FEMUR DUE TO PRIMARY BONE SARCOMAS

Background: And Aims Pathological fractures of the proximal femur due to primary bone sarcomas are difficult to treat. The aim of the study was to assess the factors determining the outcomes following pathological fractures of the proximal femur due to primary bone sarcomas. Methods: 93 patients with a pathological fracture of the proximal femur due to primary bone sarcomas were studied. The patient, tumour and treatment factors in relation to overall survival were analysed. Results: There were 55 male and 38 female patients. The mean age was 47 years. The diagnoses were Chondrosarcoma -34, Osteosarcoma – 21, spindle cell sarcoma – 25, Ewing’s sarcoma -13. 74 patients had a pathological fracture at diagnosis and 19 patients had a fracture after the diagnosis. 17 patients had metastases at diagnosis. 24 patients had an intracapsular fracture. Limb salvage was possible in 60 patients (65%), 18 patients had an amputation and 15 patients had palliative treatment. 27% of the patients were referred after an unplanned surgery. The mean follow up was 49 months [range 0–302]. Twenty one patients [23%] had a local recurrence -10 patients had a diagnosis of chondrosarcoma, four patients had osteosarcoma and seven had spindle cell sarcoma. The overall five years survival was 37% [Ewing’s sarcoma 60%, Chondrosarcoma 57%, spindle cell sarcoma 28%, osteosarcoma 13% and dedifferentiated Chondrosarcoma 0% (p-0.002)]. Metastasis at diagnosis was a significant factor (p-0.04) affecting survival. Conclusion: We conclude that a pathological fracture of the proximal femur due to osteosarcoma and dedifferentiated chondrosarcoma. carry a poor prognosis.