Rare Double Heterozygosity for Poly A(A>G) and CD17(A>T) of Beta Thalassemia Intermedia in a Chinese Family

Beta thalassemia is a hereditary disorder resulted from mutations in the β globin gene leading to alpha/beta imbalance, ineffective erythropoiesis, and chronic anemia. Three types have been defined, based on the degree of reduced beta-globin chain synthesis and clinical phenotype: major, intermedia and minor (heterozygote carrier state). Beta thalassemia intermedia is characterized by heterogeneity for the wide clinical spectrum of various genotypes and a wide range of presentations. The genotypes of beta thalassemia intermedia are much complicated referring to β+/β+,β+/β0, Hb E/β0, β0/β0 compounding alpha thalassemia and so on. In this present case, we reported a rare beta thalassemia intermedia genotype of double heterozygosity for poly A (A>G) and CD17(A>T) indicated of β+/β0 in a Chinese family.