Recent research has shown that autoimmune metaplastic<unk>  (AMAG) is a result of the immune system attacking the parietal cells. Environmental metaplastic<unk>  (EMAG) is due to environmental factors, such as diet and H. pylori infection. EMAG is typically confined to the body of the stomach. Patients with EMAG are also at increased risk of gastric carcinoma.
Atrophic gastritis
Lymphocytic esophagitis
Herpes esophagitis
Tropical ulcer
Gastric lymphoma
Eosinophilic esophagitis
Barrett's esophagus
Cytomegalovirus esophagitis