Osteosarcoma is a relatively common type of malignant bone tumor in clinical practice. It mainly occurs near the ends of the humerus, including the area around the head of the humerus, and at the distal end of the femur, near the femoral condyles, as well as the proximal tibia, close to the tibial plateau. These are its common sites. It predominantly affects teenagers, generally those under 18 years of age. The main symptoms include: firstly, persistent and worsening pain that gradually intensifies and does not alleviate, with the notable characteristic being that the pain is more severe at night than during the day; secondly, the appearance of spindle-shaped tumors around the joints, particularly at the three aforementioned common sites, often accompanied by redness, warmth, pain in the superficial skin, and even prominent superficial veins; thirdly, osteosarcoma is a type of malignant tumor, classified as grade 2B among malignant tumors. Its main feature, apart from local symptoms, is its propensity for metastasis, with the lungs being the most likely site of metastasis.