Article

Reconstruction with modular hemipelvic prostheses for periacetabular tumor

Musculoskeletal Tumor Center, People's Hospital, Peking University, Beijing, China.
Clinical Orthopaedics and Related Research (Impact Factor: 2.88). 09/2007; 461(461):180-8. DOI: 10.1097/BLO.0b013e31806165d5
Source: PubMed

ABSTRACT Periacetabular resections for primary bone sarcoma and metastatic disease require reconstruction to restore weight-bearing along anatomic axes. We designed a modular hemipelvic prosthetic system to reconstruct the pelvis and evaluated the early clinical outcome of the prosthesis using 3-year survival rate, local recurrence rate, Musculoskeletal Tumor Society (MSTS) 93 function score, and complications. We retrospectively reviewed 28 patients who had pelvic tumor resections and reconstructions using the new hemipelvic prostheses between 2001 and 2005. Sixteen (57.1%) patients had Types II and III (periacetabular and pubis) pelvic resections, seven had Types I and II (periacetabular and ilium) pelvic resections, and five had Type II (periacetabular) pelvic resection. Six patients with osteosarcoma had chemotherapy. None received radiation therapy. Patient survival status, function, and complications were evaluated at a mean followup of 30 months (range, 10-59 months). Fifteen patients were free of disease, eight patients died of disease, and five patients were alive with disease. The overall survival rate was 67.1% at 3 years. Twenty-five percent had local recurrence and 21% had metastasis. The mean MSTS 93 score was 60. Deep infection occurred in four patients; dislocation occurred in one patient. The results are encouraging because of the acceptable complication rate and satisfactory functional outcome.

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    ABSTRACT: The modular hemipelvic prosthesis has been used in patient of Type I-IV pelvic tumor with good outcomes, but how to keep the stability between the prosthesis and the residual sacrum is a problem. An additional screw-rod system seems to solve it, but its biomechanical characters are still not well understood, which need experimental evaluation.

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