Adult celiac disease (celiac sprue), pernicious anemia and IgA deficiency. Case report and review of the relationships between vitamin B12 deficiency, small intestinal mucosal disease and immunoglobulin deficiency.

A 24-year-old man with addisonian pernicious anemia, adult celiac disease and selective IgA deficiency is presented to emphasize the differential diagnosis of vitamin B12 deficient megaloblastic anemia in association with small intestinal mucosal abnormalities and the relationships between immunoglobulin deficiency, pernicious anemia, and adult celiac disease.