Novel Acetabular Hemiarthroplasty for Palliation of Periacetabular Metastatic Disease With Articular Bone Loss

Abstract

Introduction: Periacetabular metastatic disease is often successfully treated nonoperatively. Cases with extensive bone loss and the subchondral collapse of the acetabular dome require reconstruction to restore mobility. These procedures are associated with significant morbidity and postoperative complications. Objectives: The primary objective of this case study is to describe a novel “acetabular hemiarthroplasty” to manage the periacetabular metastatic disease with subchondral collapse and protrusio. Materials and Methods: Five consecutive patients with significant periacetabular bone loss and subchondral collapse were surgically managed with a novel acetabular hemiarthroplasty. The hospital records were retrospectively reviewed and outcomes at the most recent follow-up are reported. Results: Our findings suggest that acetabular hemiarthroplasty could be a valuable option for surgical palliation of periacetabular metastatic disease involving subchondral collapse and protrusio. Conclusion: This technique provides for the restoration of joint mechanics and weight bearing without the need for total hip arthroplasty. Compared with complex hip arthroplasty, the authors believe this novel acetabular hemiarthroplasty potentially reduces operative time and blood loss while substantially limiting the risk of dislocation.