Evaluation and treatment of pelvic metastases.

Advances in systemic treatment of cancer have improved patients' survival and increased the number of patients presenting with metastases of the pelvic ring. Pelvic metastatic lesions may cause severe pain and functional disability. A multidisciplinary approach is fundamental for the management of these lesions. Lesions of the pelvis not directly involving the hip joint such as the ischium, pubis or sacroiliac area can generally be treated non-operatively with radiation alone or using minimally invasive procedures of radiofrequency ablation, cryosurgery and percutaneous osteoplasty. Periacetabular destructive lesions may require total hip replacement with reconstruction of the acetabulum dependent on the extent of the defect. Operative treatment should restore the mechanical stability of the hip joint, and preserve the mobility, independence and comfort of these patients.