Complications, implant survival and functional outcome of patients with pelvic metastasis treated with standard or dual mobility bearing total hip arthroplasty and antiprotrusio cage
摘要
The goal of surgery for pelvic metastasis is pain-free reconstruction that enables daily activity without complications for the patient’s remaining life. The purpose of our study was to assess complications, reoperations, functional outcomes, and survival in patients with pelvic metastasis treated with standard or dual mobility total hip arthroplasty (THA) and antiprotrusio cage.
MethodsWe prospectively analyzed 36 patients with pelvic metastasis who underwent reconstruction with standard (n = 20) or dual mobility (n = 16) bearing THA and antiprotrusio cage between 2015 and 2024 at a single institution. We evaluated complications, reoperations, functional outcomes and survival.
ResultsInfection occurred in five of 36 patients (14%): three patients required surgical debridement and two were managed with antibiotics. No dislocations were observed in both standard and dual mobility bearing groups. Local disease progression developed in seven of 36 patients (19%), with only one patient requiring acetabular revision at 63 months postoperatively. Survival of implant was 85.8% (95% CI 74.9%-98.2%) at one year after reconstruction. Median MSTS scores were 22.5 and 20.0 in the standard and dual mobility bearing groups, respectively (p = 0.564), with no difference in ambulation status. Patient survival was 77.7% (95% CI 65.2%-92.6%) at one year and 12.8% (95% CI 4.5%-36.1%) at five years.
ConclusionPatients with pelvic metastasis treated with standard or dual mobility bearing THA with antiprotrusio cage may effectively restore painless function. Despite high risk of infection and local disease progression, no dislocation occurred, supporting this reconstruction as an acceptable surgical option for patients with pelvis metastasis who need surgical treatment.