A study by Nicolino-Peltier et al. on the detection of pernicious anemia in a group of 120 patients with autoimmune thyroid disease helped the probable diagnosis of pernicious anemia in pre-stage anemia in 8 patients of the 120 patients with autoimmune thyroiditis disease (including a balance sheet looking for anti-gastric mucosal antibodies, assay of gastrin and vitamin B12 by radioimmunoassay) [7]. This evidence concerns the gene GAST and pernicious anemia.