Shark bite bone resection in treatment of surface sarcomas

Abstract

Background: Surface bone sarcomas including parosteal sarcoma as the most common type are considered well differentiated sarcomas with rare intramedullary involvement. They are characterized by low incidence of local recurrence and distant metastasis. As they involve a portion of cortical bone, hemi-cortical resection (shark bite resection) seems to be an appealing option with low morbidity and better function. We aim to evaluate oncological outcome and functional results for a cohort of patients with surfaces sarcomas treated by shark bite resection. Methods: A prospective study of 25 patients presented with surface malignant bone sarcomas between 2016 and 2022 in our institution. We performed hemicortical resection and biological reconstruction. Follow up period was 2-8 years. Functional outcome was assessed using MSTS scoring system. Results: The mean MSTS at the end of follow up was 29 (range 27-30). Mean resected bone surface was 9 cm (range 7-14). Mean time for bone union was 8 months (range 6-15 months). Conclusion: Shark bite resection is a valuable option for treatment of low-grade surface sarcomas. It provides better outcome, native joint preservation and low complication rate.