Analysis of five-year survival rate in patients with proximal femoral tumours after total hip replacement

Abstract

19508 Background: To analyse the five-year survival rate in patients with proximal femoral tumours after total hip replacement. Methods: Between the period of 1994–2003, 50 patients were operated (Total Hip Replacement) for proximal femoral tumours at the Department of General Oncology (Bone & Soft tissue tuomurs), N. N. Blokhin Cancer Research Institute & Moscow Regional Clinical Research Institute, Moscow, Russian Federation. The histological diagnoses included 14 - metastases, 10 - osteosarcoma, 8 - chondrosarcoma, 4 - Ewing’s sarcoma, 4 - Giant cell tumor, 3 - malignant fibrous histiocytoma, 2 paraosteal and 2 periosteal osteosarcoma, and 1 each from primary neuroectodermal tumor, myeloid disease, and aneurysmal bone cyst. The follow-up ranged from 1–9 years (mean follow-up 5 years). 21 patients (45.7%) had pathological fracture. The cause of the pathological fracture was metastasis in 12 patients (26%). 28 patients (60.8%), had soft tissue invasion. All the survival analyses were done using Kaplan-Meier survivorship analysis method. Functional outcome was estimated using Enneking’s evaluation criteria. Results: The overall survival rate of patients was 66.7% at 5 years. 2 patients had local recurrence.12 patients had metastases after surgery. In that 11 patients were died. There was no evidence of disease in 32 patients. In 3 patients, we performed disarticulation of the hip joint because of the local recurrence. The overall survival rate of limb was 92.7% at 5 years. The overall survival rate of prostheses was 84.2% at 5 years. At the latest follow up, functional outcome was excellent in 15 (30%) patients, good in 27 (54%) patients, fair in 5 (10%) patients, poor in 3 (6%) patients. Conclusions: Though the extent of the muscle and bone resection is large, there is no doubt that endoprosthetic replacement of the proximal femur provides a good functional and oncological outcome when compared with the various other reconstructive surgeries. No significant financial relationships to disclose.