The early symptoms of osteosarcoma are generally not very obvious, manifesting only as occasional pain and discomfort around the joints, which can limit joint mobility. As the condition progresses, this intermittent pain becomes continuous. Additionally, the intensity of the pain gradually increases, and lumps may also appear, which typically cause pain when pressed. As the disease further advances, patients may also experience low-grade fever, anemia, and liver and kidney failure, eventually leading to pathological fractures. Therefore, for the treatment of osteosarcoma, early detection and early treatment are crucial for the best prognosis.