Mesenchymal tumors are a specific type of tumor with malignant potential. Mesenchymal tumors are benign if they are relatively small, and become malignant if they increase in size with physical examination. Clinically, mesenchymal tumors are generally called junctional tumors and have both benign and malignant components. Early surgical treatment is the key to cure. If the size of mesenchymal tumor is relatively small, early surgical treatment can cure most of them completely. If the size of mesenchymal tumor is large, it will become malignant, and even after surgery, it is easy to recur. Therefore, after the surgery of large mesenchymal tumor, it is necessary to follow the treatment of cancer to prevent the recurrence of tumor.