Reconstruction of acetabular bone defects with trabecular metal following pelvic tumor resection done at tertiary referral center for sarcoma patients: A case series

Background Periacetabular resections for pelvic tumors present complex reconstructive challenges. Trabecular metal implants, known for their osteoconductive properties, offer a promising solution for managing segmental acetabular defects. Methods We retrospectively reviewed 29 patients (10 females, 19 males, mean age 58.9 years) who underwent P2 pelvic resections and acetabular reconstructions using trabecular metal between 2014 and 2022 at a tertiary sarcoma center. Fixation survival was assessed radiologically and clinically. Functional outcomes were evaluated using the Toronto Extremity Salvage Score (TESS) and Oxford Hip Score. Results Indications included chondrosarcoma (n=15), metastasis (n=9), Ewing sarcoma (n=3), and others (n=2). At a mean follow-up of 7.5 years, 25 patients were alive, with 84.0% implant survival. Complications included three infections, one dislocation, one aseptic loosening, and one neuropraxia. Mean postoperative TESS was 63.5/100; Oxford Hip Score was 47.7 (range 41–57). Conclusion Trabecular metal acetabular implants offer a robust, modular solution for reconstructing periacetabular defects post-oncologic resection, with acceptable complication rates and favorable mid-term outcomes.