Background and Objectives: In a previous conducted study functional outcome of young patients with bone sarcoma located around the knee was longitudinally evaluated during the first 2 years postoperatively. Functional outcome improved significantly over the first 2 years. The purpose of this descriptive study was to evaluate the functional outcome of these patients at long-term follow-up of 7 years. Methods: Functional outcome was assessed with the TESS, MSTS, Baecke questionnaire, and three functional performance tests: time up and down stairs (TUDS), various walking activities (VWA), and the 6-min walking test (6MWT). Linear Mixed Model has been employed for the repeated measurements. Results: Twenty patients of the original study (n=44) participated in the current study. Fifteen limb-salvage and five ablative surgery patients, median follow-up 7.4 years (6.8-8.0) (CI 95%), mean age 22.3 years (18.2-31.6). Between 2 and 7 years after surgery, 8 limb-salvage patients (53%) encountered surgery related complications. Questionnaires and functional performance tests showed no significant difference in functional outcome between 2 years and 7 years after surgery (P<0.05). Conclusions: Between 2 years and follow-up at average 7 years after surgery no further improvements were noticed at young patients with a bone sarcoma located around the knee.

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Keywords Follow-up, Functional outcome, Knee, Malignant bone sarcoma, Young patients
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Journal Journal of Surgical Oncology
van Egmond-van Dam, J.C. (Janneke C.), Bekkering, W.P, Bramer, J.A.M, Beishuizen, A, Fiocco, M, & Dijkstra, P.S. (P.D. Sander). (2017). Functional outcome after surgery in patients with bone sarcoma around the knee; results from a long-term prospective study. Journal of Surgical Oncology, 115(8), 1028–1032. doi:10.1002/jso.24618