The sinus is a good site for gastric lesions. Sinus stenosis is a morphologic change in which the gastric lumen is narrowed and deformed by various benign and malignant lesions. It is often functional, organic or both. Causes of sinus stenosis Sinus stenosis can occur in many intragastric and extragastric diseases, such as invasive sinus cancer, chronic gastric ulcer, chemical burns of the sinus, sinusitis, gastric tuberculosis, and peri-sinus adhesions. Among the organic stenosis of the gastric sinus, cancerous stenosis is reported to account for 34.5%, chronic gastric ulcer and sinusitis for 61.2%, while among benign lesions gastric ulcer and gastric ulcer with sinusitis are the most common, accounting for 87.8%; simple sinusitis is less common, accounting for 9.7%. Diagnosis of gastric sinus stenosis The examination of gastrointestinal diseases mainly uses barium contrast, whose value is comparable to that of endoscopy. usg and ct are of special significance for understanding the internal structure of gastrointestinal tumors, the degree of infiltration and metastasis of the gastrointestinal wall. The combined application of these methods can provide a strong basis for the classification of the stage of gastrointestinal tumors and the determination of the treatment plan. It can provide a strong basis. Angiography is used for the examination and intervention of gastrointestinal vascular diseases, gastrointestinal bleeding, and also has some value in the diagnosis of small intestinal tumors. MRI has less value in the diagnosis of gastrointestinal diseases. The identification of gastric sinus stenosis is a practical problem frequently encountered in radiological work. It is a more common X-ray sign.