Rotationplasty is a surgical procedure where a portion of the leg is removed and the remaining part is rotated to function as a knee joint. This operation is used in treating bone cancer or other conditions that affect the knee joint. There are several terms that can be used as synonyms for rotationplasty, including Van Nes rotation, limb salvage surgery, and reimplantation of the limb after rotation. Other terms that are commonly used in the medical field to describe the same procedure include femoropopliteal reinstatement, joint-preserving limb salvage, and femorotibial rotation. Each of these terms is appropriate for describing the technique used in rotationplasty and highlights the importance of this operation in treating debilitating knee conditions.