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Objectives <p>Periacetabular metastases often cause severe pain and functional impairment, whereas open acetabular reconstruction carries substantial morbidity that may delay systemic cancer treatment. This study evaluated the safety and effectiveness of tripod-enhanced percutaneous reconstruction combined with microwave ablation (MWA) for periacetabular metastases.</p> Methods <p>We retrospectively reviewed 31 patients (mean age, 59.5 ± 14.4&#xa0;years; 18 men, 13 women) with acetabular metastases treated with this technique. Clinical outcomes were assessed preoperatively and at three, six&#xa0;and 12&#xa0;months postoperatively and final follow-up. Endpoints included pain (VAS), functional status (ECOG), weight-bearing ability, perioperative blood loss, complications, and survival.</p> Results <p>Fourteen of 31 patients died during follow-up, with a median postoperative survival of 35.0&#xa0;months (95% CI, 17.5–52.5). Mean VAS scores improved significantly from 5.85 ± 1.63 preoperatively to 2.48 ± 1.25, 1.22 ± 0.95, and 1.59 ± 1.10 at three, six and 12&#xa0;months, respectively (all&#xa0;<i>p</i> &lt; 0.001).&#xa0;ECOG performance status also improved from 2.44 ± 1.00 to 1.60 ± 0.65, 1.48 ± 0.59, and 1.50 ± 0.67&#xa0;at three, six&#xa0;and 12&#xa0;months. In patients surviving beyond one&#xa0;year (12–41&#xa0;months), pain relief and functional improvement were maintained.&#xa0;No implant failure, infection, or treatment delay occurred.&#xa0;At final follow-up, 21 patients (67.7%) achieved independent ambulation, seven (22.6%) required assistive devices, and three (9.7%) received additional radiotherapy. No patient underwent total hip arthroplasty.</p> Conclusion <p>Tripod-enhanced percutaneous reconstruction combined with MWA is a safe, minimally invasive, and effective option for periacetabular metastases, providing durable pain relief and improved mobility.</p>

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The effectiveness and safety of tripod-enhanced percutaneous reconstruction combined with local tumour inactivation for periacetabular metastases: a long-term follow-up study

  • 期刊论文

  • 发表日期：

    2026年7月29日

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  • Yuan Yan,
  • Guoli Huang,
  • Peng Gu,
  • Xin Wang,
  • Wenhan Huang,
  • Mengyu Yao,
  • Yu Zhang

摘要

Objectives

Periacetabular metastases often cause severe pain and functional impairment, whereas open acetabular reconstruction carries substantial morbidity that may delay systemic cancer treatment. This study evaluated the safety and effectiveness of tripod-enhanced percutaneous reconstruction combined with microwave ablation (MWA) for periacetabular metastases.

Methods

We retrospectively reviewed 31 patients (mean age, 59.5 ± 14.4 years; 18 men, 13 women) with acetabular metastases treated with this technique. Clinical outcomes were assessed preoperatively and at three, six and 12 months postoperatively and final follow-up. Endpoints included pain (VAS), functional status (ECOG), weight-bearing ability, perioperative blood loss, complications, and survival.

Results

Fourteen of 31 patients died during follow-up, with a median postoperative survival of 35.0 months (95% CI, 17.5–52.5). Mean VAS scores improved significantly from 5.85 ± 1.63 preoperatively to 2.48 ± 1.25, 1.22 ± 0.95, and 1.59 ± 1.10 at three, six and 12 months, respectively (all p < 0.001). ECOG performance status also improved from 2.44 ± 1.00 to 1.60 ± 0.65, 1.48 ± 0.59, and 1.50 ± 0.67 at three, six and 12 months. In patients surviving beyond one year (12–41 months), pain relief and functional improvement were maintained. No implant failure, infection, or treatment delay occurred. At final follow-up, 21 patients (67.7%) achieved independent ambulation, seven (22.6%) required assistive devices, and three (9.7%) received additional radiotherapy. No patient underwent total hip arthroplasty.

Conclusion

Tripod-enhanced percutaneous reconstruction combined with MWA is a safe, minimally invasive, and effective option for periacetabular metastases, providing durable pain relief and improved mobility.