1.What is sarcoma? A malignant tumor that occurs in mesenchymal tissue is called sarcoma. 2.What is mesenchymal tissue? It is also called mesenchymal tissue, which is a collective name for the tissue that develops from mesenchymal tissue in the mesoderm during embryonic development. Such as: connective tissue; fat; vasculature; bone; cartilage; mucus tissue; lymphatic tissue; transverse muscle; smooth muscle; synovial tissue; mesothelial tissue, etc. 3.What are the characteristics of age, sex and location of fibrosarcoma? The incidence of fibrosarcoma is high at the age of 40-70, and the proportion of men and women is equal, but there are reports that there are more men than women. The onset of the disease occurs mostly in the proximal extremities, more in the lower extremities than in the upper extremities, followed by the trunk and head and neck. 4.What are the general symptoms of fibrosarcoma? Most of the patients are asymptomatic nodules, but some of them have pain, especially in patients with nerve compression. The growth of the mass tends to accelerate after trauma or puncture. 5.What is the general prognosis of fibrosarcoma? The 5-year survival rate is over 78%. 6.What is the recurrence of fibrosarcoma? The recurrence of fibrosarcoma is related to the quality of resection. If the pathology of the tumor is confirmed by intraoperative resection, the recurrence rate is 10%, but the opposite is 70%. 7.What is the treatment of fibrosarcoma? Surgical resection is the preferred option for fibrosarcoma, and clean resection of all margins including the base is the principle of surgery. At present, it is considered that adequate resection scope is better than radiotherapy, and of course, preoperative radiotherapy can be chosen for huge sarcoma. The duration of chemotherapy and radiotherapy can be prolonged for patients with high tissue staging.