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Background Some malignant pelvic tumor may affect the anterior or posterior column at the acetabula area. The postoperative recurrence and complication rate are high. Precise resection with safe surgical margin could cure the patients while saving healthier host bone for relative simple reconstruction. The purpose of this study is to evaluate the effect of precise single column resection and reconstruction with femoral head plus THR for malignant pelvic tumors. Health Sciences EPiC Series in Health Sciences Volume 2, 2018, Pages 142–151 CAOS 2018. The 18th Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery W. Zhan and F. Rodriguez Y Baena (eds.), CAOS 2018 (EPiC Series in Health Sciences, vol. 2), pp. 142–151 Methods From 2007 to 2015, 19 patients with primary malignant tumors of the pelvis were enrolled in the study. All tumors were resected with safe surgical margins, which were proved by the postoperative specimen evaluation. Anterior column was involved in 17 cases and posterior column in 2 cases. Ten of 19 tumors were resected assisted by computer navigation. Femoral heads were used to reconstruct anterior or posterior column defects and fixed by screws; THR was used for the joint reconstruction. Oncologic outcome and function were evaluated by regular follow-up. Results The average follow-up time was 65.9 months (median 65.5, range 12-149) months. Surgical margins contained wide resection in 12 cases and marginal resection in 7 cases. The bony wide resection rate was 90% (9/10) in the navigation group and 77.8% (7/9) in free hand group respectively. One patient with Ewing's sarcoma died 14 months postoperative due to lung metastasis. There was only one case with chondrosarcoma was found recurrence in 61 months postoperatively, who was in the navigation group and having marginal margin resection. There was one prosthesis removed due to prosthesis infection (14 months postoperatively). There were another two patients with minor wound infection. The average MSTS function score was 25.1 (17-29). Conclusions The current treatment method is oncological safe and functional with less complications. Partial acetabulum can be reserved through precise plan of resection and reconstruction. Introduction Due to the complexity of the anatomical structure, surgical treatment of pelvic tumor is very difficult. The intraoperative risk and recurrence rate is high. More Precise single column resection and reconstruction with femoral head plus THR for ... X Niu et al.

Precise single column resection and reconstruction with femoral head plus THR for malignant pelvic tumors