This is an Ewing sarcoma of the right pelvis, meticulously reconstructed from CT and MRI scans. The 3D model captures the tumor's precise location and structure, providing an invaluable tool for pre-surgery planning. It can be easily printed using transparent resin, allowing surgeons to visually assess and strategize the best approach for removing the tumor. This model not only aids in surgical preparation but also enhances understanding and communication among medical professionals and patients.