Gastric mesenchymal tumor 1.5 cm, whether the condition is serious, combined with the patient’s clinical symptoms and the nature of the lesion comprehensive analysis, if the symptoms are not obvious, or benign patients, more than not serious, and vice versa will be more serious. 1. Clinical symptoms: gastric mesenchymal tumor is one of the common lesions in the digestive system, and the reason for its occurrence is not clear. Although the size of mesothelioma is 1.5 centimeters, if the patient does not have obvious clinical symptoms, such as abdominal pain, abdominal distension, nausea and vomiting, dyspepsia, malnutrition, etc., and if the condition is relatively stable for the time being, the patient’s condition will not be serious. If the patient has obvious clinical symptoms, especially when the mesenchymal tumor compresses the stomach and the surrounding tissues and organs, resulting in corresponding symptoms, the condition will be more serious, and early surgical treatment is needed. 2. Nature of lesion: the lesion is generally benign at the initial stage, but with the development of the lesion, cancer may occur in a small number of patients. Therefore, patients with benign lesions are generally not in serious condition and should pay attention to follow-up observation; otherwise, they need surgical resection and subsequent treatment with drugs such as imatinib, sunitinib, regorafenib, etc. If the gastric mesothelioma continues to grow, it will be treated with surgery. If the gastric mesenchymal tumor continues to grow and reaches 2 centimeters in diameter, surgery is needed.