Gastric mesenchymal tumors are low-grade malignant tumors originating in the mesenchymal tissue. Clinically, gastric mesenchymal tumors are generally divided into the following four stages. 1. Stage I: the diameter of gastric mesenchymal tumor is less than 2 cm, and no local lymph node metastasis or distant metastasis occurs. 2. Stage 2: the diameter of gastric mesenchymal tumor is within the range of 2 cm~5 cm, without local lymph node metastasis and distant metastasis. 3. Stage III: gastric mesenchymal tumors with a diameter of 5 cm to 10 cm, without local lymph node metastasis or distant metastasis. 4. Stage 4: the diameter of gastric mesenchymal tumor is more than 10 cm, and there are local lymph node metastasis and distant metastasis, mostly liver metastasis and peritoneal metastasis. This situation is more high-risk and requires oral Gleevec under the guidance of doctor for treatment. When gastric mesenchymal tumor occurs, it is necessary to go to the hospital for examination and treatment as soon as possible, so as to avoid the progression of the disease affecting the health.