Surgery is recommended for 4cm benign mesenchymal tumor. 4cm benign mesenchymal tumor is recommended to be surgically removed as soon as possible, because benign mesenchymal tumor is prone to malignant transformation if not operated.4cm benign mesenchymal tumor has a low probability of recurrence and metastasis after surgery, and the prognosis is good after surgery. Mesenchymal tumors usually occur in the gastrointestinal tract, mostly in the elderly, the cause of the disease is not very clear, 4cm benign mesenchymal tumor is relatively large, may not continue to develop, or may slowly grow bigger and bigger, malignant transformation, the tumor is getting bigger and bigger, the clinical symptoms, such as nausea, vomiting, abdominal pain, anemia, and other symptoms will become more and more pronounced, so it is recommended that surgical treatment. Patients with 4cm benign mesenchymal tumors should go to the hospital in time and improve the relevant examination and treatment under the guidance of oncologists.