Amputation is pediatric surgery/amputation and joint amputation. Amputation and joint amputation are destructive operations, which have long been regarded as the main means of surgical treatment of malignant bone tumors, saving patients' lives at the expense of limbs. According to the range of tumor invading bone and soft tissue and the need of installing prosthesis, the plane of amputation or joint amputation is determined Amputation at the proximal 5 ~ 7 cm of the upper margin of the tumor can achieve extensive local resection of the tumor.

Residual limb repair is a reoperation to improve the residual problems after amputation, including flap rest, bone shortening and neuroma resection. The residual limb refers to the free end of the residual limb (finger) after amputation. If the stump is not handled properly during amputation, there may be a series of problems such as poor appearance, excessive bone residue, stump neuroma, stump tenderness, phantom limb pain, phantom limb feeling and so on.