The carcinogenesis of atrophic gastritis does not have a significant relationship with the duration of the disease. The main cause of atrophic gastritis is Helicobacter pylori infection, with autoimmune abnormalities and genetic factors also playing a significant role in atrophic gastritis. Sometimes, patients with a short duration of atrophic gastritis may also develop cancer, while those who have had the disease for many years may not necessarily develop cancer. Therefore, once atrophic gastritis is diagnosed, it is important to regularly re-examine with gastroscopy to rule out the possibility of early malignancy.