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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.

Type

Journal article

Journal

Br J Haematol

Volume

66

Pages

109 - 12