1 Case data A male patient, 80 years old, was admitted to the hospital due to "epigastric pain for 10 days". The patient had no obvious inducement of epigastric pain 10+days ago, with intermittent distention and pain, accompanied by black stool, acid regurgitation, belching, and occasional dysphagia. No obvious abnormality was found on physical examination. Complete auxiliary examination: Abdominal CT showed that the gastric wall of the cardia lesser curvature was irregularly thickened, the tube wall was rigid, and the local area was in the form of a mass like process growing into the gastric cavity. The larger section size was about 4.1 cm × 3.2 cm, the CT value was about 35 HU, the density was uneven, the boundary was smooth, the focus involved the whole layer of the gastric wall, the serous surface was blurred, and the enhanced scanning showed progressive uneven enhancement in three stages (Figure 1).