Beta-thalassaemia intermedia due to a complex alpha-globin rearrangement and a heterozygous beta thalassaemia mutation.

Abstract excerpt

The alpha-thalassaemia alleles are very frequent in the world's population. The main molecular mechanism is a large deletion with the loss of one or two alpha genes. Another type of rarer abnormality exists: the gain of alpha genes. The consequence of a gain is an overproduction of alpha-globin chains, which aggravates a beta-thalassaemia trait into an intermedia phenotype (non-transfusion-dependent thalassaemia,...

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