title: Thalassaemia intermedia: interaction of the triple alpha-globin gene arrangement and heterozygous beta-thalassaemia.
abstract: Five patients with heterozygous beta-thalassaemia with an unusually severe clinical picture, low haemoglobin levels occasionally requiring blood transfusion, splenomegaly and unusually prominent basophilic stippling were found to have co-inherited a triple alpha-globin gene arrangement on one chromosome (alpha alpha alpha/alpha alpha). It seems probable that the expression of a single extra alpha-globin gene is sufficient in some patients with heterozygous beta-thalassaemia to give rise to a clinically significant degree of dyserythropoietic anaemia.
mesh_terms: D000328:Adult; D005260:Female; D005914:Globins / Q000235:genetics*; D006579:Heterozygote; D006801:Humans; D008297:Male; D005810:Multigene Family; D010641:Phenotype; D013789:Thalassemia / Q000235:genetics*
chemical_list: D005914:Globins