Fig. 2

a Pre-operative x-ray of proximal tibial exostosis, (b) real-size 3D printed model from fused deposition modeling (FDM) printer with acrylonitrile butadiene styrene (ABS) material as a physical simulation for preoperative planning, (c) + (d) gross- and micropathology of exostosis, (e) postoperative x-ray after performing marginal excision