Clinicopathological characteristics of autoimmune gastritis: A single-center retrospective study

•What is already known on this subject?.•Autoimmune gastritis is a prominent risk factor for pernicious anemia and gastric neoplasia.•What are the new findings?.•This study highlights the increased risk of severe anemia in AIFA-positive patients, particularly for pernicious anemia.•How might it impact on clinical practice in the foreseeable future?.•Clinicians should consider the presence of AIFA as a warning sign for severe anemia.