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Those with autoimmune atrophic gastritis (Type A gastritis) are statistically more likely to develop gastric carcinoma (a form of stomach cancer), Hashimoto's thyroiditis, and achlorhydria. Type A gastritis primarily affects the fundus (body) of the stomach and is more common with pernicious anemia . [ 1 ]
Pernicious anemia is the most common cause of clinically evident vitamin B 12 deficiency worldwide. [14] Pernicious anemia due to autoimmune problems occurs in about one per 1000 people in the US. Among those over the age of 60, about 2% have the condition. [8] It more commonly affects people of northern European descent. [2]
Autoimmune disease Autoantibodies Acceptance as an autoimmune disease Prevalence rate (US) Cit. Autoimmune hemolytic anemia: Anti-red blood cell antibodies Confirmed 1-3 per 100,000 [89] Immune thrombocytopenia: Anti-platelet antibodies Confirmed 3.3 per 100,000 (adults), 50 per 100,000 (children) [90] Thrombotic thrombocytopenic purpura
Pernicious anemia: D51.0: 9870: Pernicious anemia (also known as macrocytic achylic anemia, congenital pernicious anemia, juvenile pernicious anemia, and Vitamin B12 deficiency) is one of many types of the larger family of megaloblastic anemias. It is caused by loss of gastric parietal cells, and subsequent inability to absorb vitamin B 12.
Treatment of gastritis that leads to pernicious anemia consists of parenteral vitamin B-12 injection. Associated immune-mediated conditions (e.g., insulin-dependent diabetes mellitus, autoimmune thyroiditis) should also be treated. However, treatment of these disorders has no known effect in the treatment of achlorhydria.
Some of the most common diseases that are generally categorized as autoimmune include coeliac disease, type 1 diabetes, Graves' disease, inflammatory bowel diseases (such as Crohn's disease and ulcerative colitis), multiple sclerosis, alopecia areata, [9] Addison's disease, pernicious anemia, psoriasis, rheumatoid arthritis, and systemic lupus ...
Megaloblastic anemia (MA) is associated with GSE and is believed to be the result of B 12 and folate deficiency. [23] In GSE, it appears to be associated with the IgA-less phenotype. [24] Unlike other forms of megaloblastic anemia, GSEA MA is not a form of autoimmune gastritis. [25] Pernicious anemia (PA).
Gastric antral vascular ectasia (GAVE) is an uncommon cause of chronic gastrointestinal bleeding or iron deficiency anemia. [1] [2] The condition is associated with dilated small blood vessels in the gastric antrum, which is a distal part of the stomach. [1]