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SURGICAL AND FUNCTIONAL OUTCOME OF AN ANATOMICALLY-BASED APPROACH TO METASTATIC DISEASE OF THE HIP



Abstract

Purpose: To determine the surgical and functional outcome of an anatomically based approach to hip reconstruction for metastatic bone disease.

Methods: Records of 123 consecutive patients who underwent hip arthroplasty for metastatic bone disease were reviewed. Sixty one patients (63 hips) had pelvic involvement that required periacetabular reconstruction. Sixty two patients (64 hips) had proximal femoral involvement but no acetabular disease. Operative technique was guided by the extent of column and dome disease in addition to the extent of involvement of the femur. Demographic variables, functional data (ECOG scores) and survival data were analyzed.

Results: : The cohort included 94 females and 29 males, mean age 62 years (range, 39–85). Breast, lung and kidney were the most common primary sites. The average time from initial primary diagnosis to surgery was 42 months. The average time from initial primary diagnosis to surgery was significantly longer for those with breast cancer compared to those with other primary sites (65 vs. 21 months, P< 0.001). Average blood loss was 788 ml (range, 200–3800 ml) and average operative time was 2.3 hours (range, 2–6 hours). There were three perioperative deaths. Functional scores improved from an average of 2.7 preoperatively to 1.4 postoperatively (P< 0.05). Two patients required closed reduction, two required open trochanteric repair and one required ace-tabular revision. Median survival time was 15 months (range, 0–172 months). Patients with breast cancer enjoyed longer survival compared to patients with other primaries (21 vs. 9 months, P=0.02).

Conclusions: Despite the moderate risk of operative complications, an anatomically based approach to reconstruction of metastatic hip disease is effective in improving functional outcome and quality of life in many patients.

Correspondence should be addressed to Cynthia Vezina, Communications Manager, COA, 4150-360 Ste. Catherine St. West, Westmount, QC H3Z 2Y5, Canada