Gastric special staining PAS positive can be seen in chronic gastritis, gastric ulcer, gastric cancer, etc. Further examination is needed to confirm the diagnosis. PAS refers to a method of special staining of gastric mucosa, which is to detect the glycogen type of cells and used for the diagnosis and differentiation of gastric mucosal diseases.PAS staining positivity can be seen in chronic gastritis, gastric ulcer, gastric cancer and other diseases, and there is no specificity. When the test is positive for PAS, it suggests a higher chance of having cancer, but it does not exclude that it is due to other causes, such as chronic gastritis and gastric ulcer. In order to further confirm the diagnosis, you should also go to the regular medical institutions in time, improve the electronic gastroscopy, Helicobacter pylori test, barium meal test, etc. to make a clear diagnosis, and choose the appropriate treatment and medication under the guidance of the doctor.