1, the incidence of osteosarcoma accounted for 80% of malignant bone tumors alert! Teenagers are the high incidence of population General tumor has benign and malignant points, bone tumor is no exception. The classification of bone tumors: primary bone tumors originating from bones are divided into benign and malignant. Benign bone tumors are generally not easy to metastasize and have low recurrence, common ones are osteochondroma (occurring in teenagers), giant cell tumor of bone (occurring in adults), etc. On the contrary, malignant tumors have low recurrence. On the contrary, malignant tumors have high recurrence and are easy to metastasize, the most common is osteosarcoma, the incidence of which accounts for 80% of all primary malignant tumors. Osteosarcoma is prevalent in adolescents, due to the fact that adolescents are in the stage of rapid growth and development, and they are most susceptible to external stimuli and disturbances. The process of growth and development of every human being is metabolism, old cells keep dying and new cells keep producing. If the new cells are subjected to external stimulation or environmental interference during the process of new cell production, it can undergo mutation and variation during the process of growth and development, and form tumor cells. Therefore, adolescents with swelling and pain must be concerned. In addition, there are two other types of bone tumors, one is cancer cells from other tissues or organs in the body, which can be transferred to bone tissues through blood circulation or lymphatic system to form bone metastatic cancer. Secondly, some lesions are not real tumors, but their clinical manifestations, X-ray or pathological manifestations are similar to bone tumors, which are called tumor-like lesions. However, for the etiology of bone tumors, bone tumors, like other tumors, do not have a clear etiology. At the same time, there is no clear evidence of what bad habits of life can cause bone tumors, but some stimuli, such as trauma radiation and other stimuli can promote or induce bone tumors. Although the cause is unknown and it is difficult for us to prevent it, but if we give more attention to it, it can be detected and diagnosed at an early stage. 2, teenagers appear unexplained bone pain need to be alert to bone tumors in the clinic there are many cases of bone tumors, not early detection, so that missed the good time for treatment. Early diagnosis and early treatment will greatly improve the effect of treatment. Whether early detection and diagnosis can be achieved depends largely on the vigilance of patients, their families and receiving doctors for bone tumors. For benign bone tumors, early symptoms will appear benign lumps, growth is very slow, usually counted in years, no pain, no itch. For malignant bone tumors, early symptoms will appear pain or swelling around bones and joints, often worse at night, and not necessarily related to sports, trauma and other reasons, the growth of the lumps is fast, usually calculated in months. Sometimes there is also skin fever and even pathologic fractures. Parents should always observe and ask about their children’s development. If an adolescent develops unexplained swelling and pain in the joints, which is not related to sports or trauma, he or she needs to go to a specialist hospital in time for an examination to exclude the possibility of bone tumors. However, many parents mistakenly think that their children are suffering from growing pains or pains caused by sports injuries and do not take it seriously. Local general clinics are often unable to diagnose the disease correctly. Therefore, any patient who has pain that causes bone and joint pain and cannot be relieved after ten days should go to a specialized hospital for examination as soon as possible, or go to a different tertiary hospital to avoid the situation of missed diagnosis and misdiagnosis. 3.Confirm diagnosis: diagnose bone tumor “three steps” How to diagnose bone tumor correctly? Bone tumor diagnosis generally has three steps: first, bone tumor specialist through the clinical manifestations of the initial judgment, whether the pain, whether there is pressure, whether there is trauma, whether there is a mass, mass hardness, size, experienced specialists based on these symptoms can be roughly differentiated from the tumor or trauma or infection. Secondly, according to the imaging examination, such as X-ray, CT, MRI, whole-body bone scan. Finally, pathology tests, such as needle biopsy, are recommended to determine whether the tumor is benign or malignant based on the tumor cells, which is the final method to confirm the diagnosis. What exactly do you do when you are diagnosed with a bone tumor? When most people hear tumor, they think it is a scary thing. In fact, with the improvement of medical technology nowadays, the surgical treatment of bone tumors as well as auxiliary treatment has been improved, and the survival period of patients with malignant tumors has been prolonged. At present, benign bone tumors or tumor-like lesions are mainly surgically resected or scraped, generally with lower recurrence, easy to cure and better prognosis. For malignant bone tumors, the treatment effect is not so good, long-term follow-up, as long as after standardized surgery and chemotherapy, the five-year survival rate can reach 50%-70%. Malignant bone tumors generally take extensive resection, or amputation. Is it better to preserve the limb or amputate the limb? There is also a lot of debate in the medical community. Now, the overall five-year survival rate for malignant bone tumors is improving, to the point where amputation and limb-sparing surgery are not considered important factors in prolonged survival. This is because the malignancy can cause danger not locally, but rather it metastasizes through the circulation to other places such as the lungs. It should be noted that limb-sparing treatment depends on whether the surgeon can completely remove the tumor and protect the important surrounding blood vessels, which largely depends on different medical technologies. Where medical conditions are good and technology is advanced and developed, limb preservation exceeds amputation, “but the current situation in our country is that amputation is more common because most of the patients come in with long delays, the mass is bigger and it affects the surrounding muscles, nerves and blood vessels, which makes it difficult to carry out limb preservation surgery.” This is an important reason to hope for early detection and early treatment for the majority of patients. If you find any have caused pain and lumps around the joints, you should go to a high-level specialized hospital for examination as soon as possible, and choose different tertiary hospitals to avoid missed diagnosis. In addition, it is recommended that the majority of patients do not believe that traditional Chinese medicine can cure the tumor, traditional Chinese medicine can be used as an auxiliary treatment, not as the only treatment. The most effective treatment is combined treatment, not just surgery, or chemotherapy and radiotherapy, only comprehensive treatment can improve the long-term survival of patients.