title: Immunoglobulin deficiency responding to vitamin B12 in two elderly patients with megaloblastic anaemia.
abstract: Two elderly patients with vitamin B12 deficiency were found to have low immunoglobulin levels. These returned to normal on treatment with vitamin B12.
mesh_terms: D000368:Aged; D000748:Anemia, Macrocytic / Q000209:etiology*; D000749:Anemia, Megaloblastic / Q000188:drug therapy / Q000209:etiology*; D005260:Female; D006801:Humans; D007136:Immunoglobulins / Q000172:deficiency*; D008297:Male; D014805:Vitamin B 12 / Q000627:therapeutic use*
chemical_list: D007136:Immunoglobulins; D014805:Vitamin B 12