Fig. 4From: Internal Hemipelvectomy for primary bone sarcomas using intraoperative patient specific instruments- the next step in limb salvage conceptA physical 3D printed model in a 1:1 ratio of a tumor in the left iliac bone. The tumor is demarcated in purple. The iliac bone is transparent to show the extension of the tumor inside the bone. Blue parts are the PSI of the precise osteotomyBack to article page